[safe/jmp/linux-2.6] / drivers / s390 / cio / 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 <cohuck@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/config.h>
#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 <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/qdio.h>

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

#define VERSION_QDIO_C "$Revision: 1.113 $"

/****************** 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 ("
        VERSION_QDIO_C "/" VERSION_QDIO_H  "/" VERSION_CIO_QDIO_H ")";

#ifdef QDIO_PERFORMANCE_STATS
static int proc_perf_file_registration;
static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
static struct qdio_perf_stats perf_stats;
#endif /* QDIO_PERFORMANCE_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;

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 **********************/

static inline __u64 
qdio_get_micros(void)
{
        return (get_clock() >> 10); /* 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 inline int
qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
{
        char dbf_text[15];

        if (ccq == 0 || ccq == 32 || ccq == 96)
                return 0;
        if (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 inline 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;
        ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
        rc = qdio_check_ccq(q, ccq);
        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 inline 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;
        ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
        rc = qdio_check_ccq(q, ccq);
        if (rc < 0) {
                QDIO_DBF_TEXT3(1,trace,"sqberr");
                sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,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*));

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.siga_syncs++;
#endif /* QDIO_PERFORMANCE_STATS */

        cc = do_siga_sync(0x10000|q->irq, 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;

       irq = (struct qdio_irq *) q->irq_ptr;
       if (!irq->is_qebsm)
               return do_siga_output(0x10000|q->irq, q->mask, busy_bit, fc);
       fc |= 0x80;
       return do_siga_output(irq->sch_token, q->mask, busy_bit, fc);
}

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

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.siga_outs++;
#endif /* QDIO_PERFORMANCE_STATS */

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

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

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.siga_ins++;
#endif /* QDIO_PERFORMANCE_STATS */

        cc = do_siga_input(0x10000|q->irq, 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 inline 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 inline 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_swap(&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 inline 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 inline 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))
                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 inline 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 inline 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 inline 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->irq,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->irq,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 inline 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 inline 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);
#ifdef QDIO_PERFORMANCE_STATS
                o_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
                /* 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;
        }
#ifdef QDIO_PERFORMANCE_STATS
        o_p_nc++;
        perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */

        /* 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->is_iqdio_q) {
                /* 
                 * for asynchronous queues, we better check, if the fill
                 * level is too high. for synchronous queues, the fill
                 * level will never be that high. 
                 */
                if (atomic_read(&q->number_of_buffers_used)>
                    IQDIO_FILL_LEVEL_TO_POLL)
                        qdio_mark_q(q);

        } else if (!q->hydra_gives_outbound_pcis)
                if (!qdio_is_outbound_q_done(q))
                        qdio_mark_q(q);

        qdio_release_q(q);
}

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

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


static inline 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_NOT_INIT, &count);
#endif /* QDIO_USE_PROCESSING_STATE */

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

        return q->first_to_check;
}

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

#ifdef QDIO_PERFORMANCE_STATS
        static int old_pcis=0;
        static int old_thinints=0;

        if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
                perf_stats.start_time_inbound=NOW;
        else
                old_pcis=perf_stats.pcis;
#endif /* QDIO_PERFORMANCE_STATS */

        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 inline 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)
                /* 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 inline 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*));
                QDIO_DBF_TEXT4(0,trace,dbf_text);
                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 inline 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;

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
        perf_stats.inbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
}

static inline 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);
#ifdef QDIO_PERFORMANCE_STATS
                ii_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
                /* 
                 * as we might just be about to stop polling, we make
                 * sure that we check again at least once more 
                 */
                tiqdio_sched_tl();
                return;
        }
#ifdef QDIO_PERFORMANCE_STATS
        ii_p_nc++;
#endif /* QDIO_PERFORMANCE_STATS */
        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];
#ifdef QDIO_PERFORMANCE_STATS
                        perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
                        if (!qdio_is_outbound_q_done(oq))
                                __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(struct qdio_q *q)
{
        __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
}

static inline 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);
#ifdef QDIO_PERFORMANCE_STATS
                i_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
                /* 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;
        }
#ifdef QDIO_PERFORMANCE_STATS
        i_p_nc++;
        perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */

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(struct qdio_q *q)
{
        __qdio_inbound_processing(q);
}

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

#ifdef QDIO_USE_PROCESSING_STATE
static inline 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);
#ifdef QDIO_PERFORMANCE_STATS
                ii_p_c++;
#endif /* QDIO_PERFORMANCE_STATS */
                /* 
                 * 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 inline 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");

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.tl_runs++;
#endif /* QDIO_PERFORMANCE_STATS */

        tiqdio_inbound_checks();
}

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

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

        for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
                if (!irq_ptr->input_qs[i])
                        goto next;

                kfree(irq_ptr->input_qs[i]->slib);
                kfree(irq_ptr->input_qs[i]);

next:
                if (!irq_ptr->output_qs[i])
                        continue;

                kfree(irq_ptr->output_qs[i]->slib);
                kfree(irq_ptr->output_qs[i]);

        }
        kfree(irq_ptr->qdr);
        kfree(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;
        int result=-ENOMEM;

        for (i=0;i<no_input_qs;i++) {
                q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);

                if (!q) {
                        QDIO_PRINT_ERR("kmalloc of q failed!\n");
                        goto out;
                }

                memset(q,0,sizeof(struct qdio_q));

                q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
                if (!q->slib) {
                        QDIO_PRINT_ERR("kmalloc of slib failed!\n");
                        goto out;
                }

                irq_ptr->input_qs[i]=q;
        }

        for (i=0;i<no_output_qs;i++) {
                q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);

                if (!q) {
                        goto out;
                }

                memset(q,0,sizeof(struct qdio_q));

                q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
                if (!q->slib) {
                        QDIO_PRINT_ERR("kmalloc of slib failed!\n");
                        goto out;
                }

                irq_ptr->output_qs[i]=q;
        }

        result=0;
out:
        return result;
}

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->irq);
        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->irq=irq_ptr->irq;
                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->tasklet.data=(unsigned long)q;
                /* q->is_thinint_q isn't valid at this time, but
                 * irq_ptr->is_thinint_irq is */
                q->tasklet.func=(void(*)(unsigned long))
                        ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
                         &qdio_inbound_processing);

                /* 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;
                q->int_parm=int_parm;
                q->is_input_q=0;
                q->irq=irq_ptr->irq;
                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;

                q->tasklet.data=(unsigned long)q;
                q->tasklet.func=(void(*)(unsigned long))
                        &qdio_outbound_processing;

                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");

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.thinints++;
        perf_stats.start_time_inbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */

        /* 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->irq,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 inline void
qdio_irq_check_sense(int irq, struct irb *irb)
{
        char dbf_text[15];

        if (irb->esw.esw0.erw.cons) {
                sprintf(dbf_text,"sens%4x",irq);
                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");
                HEXDUMP16(WARN,"irb: ",irb);
                HEXDUMP16(WARN,"sense data: ",irb->ecw);
        }
                
}

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

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.pcis++;
        perf_stats.start_time_inbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */
        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 {
#ifdef QDIO_PERFORMANCE_STATS
                        perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
                        __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];
#ifdef QDIO_PERFORMANCE_STATS
                perf_stats.tl_runs--;
#endif /* QDIO_PERFORMANCE_STATS */
                if (qdio_is_outbound_q_done(q))
                        continue;
                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 inline 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(void *data)
{
        struct ccw_device *cdev;

        cdev = (struct ccw_device *)data;
        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 %04x: timed out\n",
                               irq_ptr->irq);
                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=0x%x.\n",
                                irq_ptr->irq);
                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 %04x killed by cio.\n",
                                irq_ptr->irq);
                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, (void *)cdev);
                        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->irq, 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->irq;
        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(0x10000|q->irq, 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(0x10000|q->irq, q->mask, 0);
        } else 
                return -EINVAL;

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

        return cc;
}

static inline 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;
                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 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
        if (!ssqd_area) {
                QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
                                "SIGAs for sch x%x.\n", irq_ptr->irq);
                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->irq;
        ssqd_area->last_sch = irq_ptr->irq;
        result = chsc(ssqd_area);

        if (result) {
                QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
                                "SIGAs for sch x%x.\n",
                                result, irq_ptr->irq);
                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 x%x.\n",
                                ssqd_area->response.code, irq_ptr->irq);
                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->irq)) {
                QDIO_PRINT_WARN("huh? problems checking out sch x%x... " \
                                "using all SIGAs.\n",irq_ptr->irq);
                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);
        free_page ((unsigned long) ssqd_area);
        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_ARCH_S390X
        /* 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;
                u32 subsystem_id;
                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 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
        if (!scssc_area) {
                QDIO_PRINT_WARN("No memory for setting indicators on " \
                                "subchannel x%x.\n", irq_ptr->irq);
                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->subsystem_id = (1<<16) + irq_ptr->irq;
        /* 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 x%x, " \
                                "cc=%i.\n",irq_ptr->irq,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:
        free_page ((unsigned long) scssc_area);
        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 = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
        if (!scsscf_area) {
                QDIO_PRINT_WARN("No memory for setting delay target on " \
                                "subchannel x%x.\n", irq_ptr->irq);
                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 x%x, " \
                                "cc=%i. Continuing.\n",irq_ptr->irq,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:
        free_page ((unsigned long) scsscf_area);
        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->irq);
        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->irq);
        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);
                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->irq);
        QDIO_DBF_TEXT1(0,trace,dbf_text);
        QDIO_DBF_TEXT0(0,setup,dbf_text);

        cdev->private->qdio_data = 0;

        up(&irq_ptr->setting_up_sema);

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

static inline 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 inline 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 inline 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 inline 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 inline 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 inline 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->irq);
                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 0x%x (cs=x%x, ds=x%x).\n",
                               irq_ptr->irq,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 %04x: didn't get "
                               "device end: dstat=%02x, cstat=%02x\n",
                               irq_ptr->irq, 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 %04x: got "
                               "the following devstat: dstat=%02x, "
                               "cstat=%02x\n",
                               irq_ptr->irq, 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->irq);
        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->irq);
        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->irq);
        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=kmalloc(sizeof(struct qdio_irq), 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("kmalloc of irq_ptr failed!\n");
                return -ENOMEM;
        }

        memset(irq_ptr,0,sizeof(struct qdio_irq));

        init_MUTEX(&irq_ptr->setting_up_sema);

        /* QDR must be in DMA area since CCW data address is only 32 bit */
        irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
        if (!(irq_ptr->qdr)) {
                kfree(irq_ptr);
                QDIO_PRINT_ERR("kmalloc 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_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;
}

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->irq = init_data->cdev->private->irq;
        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 0x%x\n",irq_ptr->irq);
                        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->irq);
        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(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 %04x: do_IO " \
                           "returned %i, next try returned %i\n",
                           irq_ptr->irq,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->irq);
        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 %04x: do_IO " \
                           "returned %i, next try returned %i\n",
                           irq_ptr->irq,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 inline 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;
        qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
        if (irq->is_qebsm) {
                while (count)
                        set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
                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 inline 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;

        qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
        if (irq->is_qebsm) {
                while (count)
                        set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
                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 inline 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_swap(&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 inline 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 */
#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.start_time_outbound=NOW;
#endif /* QDIO_PERFORMANCE_STATS */

        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) {
#ifdef QDIO_PERFORMANCE_STATS
                perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
                perf_stats.outbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
                return;
        }
        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");
#ifdef QDIO_PERFORMANCE_STATS
                                perf_stats.fast_reqs++;
#endif /* QDIO_PERFORMANCE_STATS */
                        }
                }
                /* 
                 * 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);
        }

#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
        perf_stats.outbound_cnt++;
#endif /* QDIO_PERFORMANCE_STATS */
}

/* 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->irq);
        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;
}

#ifdef QDIO_PERFORMANCE_STATS
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)
        _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
        _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
        _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
        _OUTP_IT("Number of tasklet runs (total)                  : %u\n",
                 perf_stats.tl_runs);
        _OUTP_IT("\n");
        _OUTP_IT("Number of SIGA sync's issued                    : %u\n",
                 perf_stats.siga_syncs);
        _OUTP_IT("Number of SIGA in's issued                      : %u\n",
                 perf_stats.siga_ins);
        _OUTP_IT("Number of SIGA out's issued                     : %u\n",
                 perf_stats.siga_outs);
        _OUTP_IT("Number of PCIs caught                           : %u\n",
                 perf_stats.pcis);
        _OUTP_IT("Number of adapter interrupts caught             : %u\n",
                 perf_stats.thinints);
        _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %u\n",
                 perf_stats.fast_reqs);
        _OUTP_IT("\n");
        _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
                 perf_stats.inbound_time);
        _OUTP_IT("Number of inbound transfers                     : %u\n",
                 perf_stats.inbound_cnt);
        _OUTP_IT("Total time of all outbound do_QDIOs (us)        : %u\n",
                 perf_stats.outbound_time);
        _OUTP_IT("Number of do_QDIOs outbound                     : %u\n",
                 perf_stats.outbound_cnt);
        _OUTP_IT("\n");

        return c;
}

static struct proc_dir_entry *qdio_perf_proc_file;
#endif /* QDIO_PERFORMANCE_STATS */

static void
qdio_add_procfs_entry(void)
{
#ifdef QDIO_PERFORMANCE_STATS
        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);
#endif /* QDIO_PERFORMANCE_STATS */
}

static void
qdio_remove_procfs_entry(void)
{
#ifdef QDIO_PERFORMANCE_STATS
        perf_stats.tl_runs=0;

        if (!proc_perf_file_registration) /* means if it went ok earlier */
                remove_proc_entry(QDIO_PERF,&proc_root);
#endif /* QDIO_PERFORMANCE_STATS */
}

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=(__u32*)kmalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
                                   GFP_KERNEL);
        if (!indicators) return -ENOMEM;
        memset(indicators,0,sizeof(__u32)*(INDICATORS_PER_CACHELINE));
        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 int __init
init_QDIO(void)
{
        int res;
#ifdef QDIO_PERFORMANCE_STATS
        void *ptr;
#endif /* QDIO_PERFORMANCE_STATS */

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

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

        res = qdio_register_dbf_views();
        if (res)
                return res;

        QDIO_DBF_TEXT0(0,setup,"initQDIO");

#ifdef 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*));
#endif /* QDIO_PERFORMANCE_STATS */

        qdio_add_procfs_entry();

        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();

        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);