blob: 2b5bfb7c69e5c81d6d8ab74c6fd011dcb6fad7bb [file] [log] [blame]
/*
*
* linux/drivers/s390/cio/qdio.c
*
* Linux for S/390 QDIO base support, Hipersocket base support
* version 2
*
* Copyright 2000,2002 IBM Corporation
* Author(s): Utz Bacher <utz.bacher@de.ibm.com>
* 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
*
* Restriction: only 63 iqdio subchannels would have its own indicator,
* after that, subsequent subchannels share one indicator
*
*
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/timer.h>
#include <linux/mempool.h>
#include <asm/ccwdev.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/semaphore.h>
#include <asm/timex.h>
#include <asm/debug.h>
#include <asm/s390_rdev.h>
#include <asm/qdio.h>
#include <asm/airq.h>
#include "cio.h"
#include "css.h"
#include "device.h"
#include "qdio.h"
#include "ioasm.h"
#include "chsc.h"
/****************** MODULE PARAMETER VARIABLES ********************/
MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
MODULE_DESCRIPTION("QDIO base support version 2, " \
"Copyright 2000 IBM Corporation");
MODULE_LICENSE("GPL");
/******************** HERE WE GO ***********************************/
static const char version[] = "QDIO base support version 2";
static int qdio_performance_stats = 0;
static int proc_perf_file_registration;
static struct qdio_perf_stats perf_stats;
static int hydra_thinints;
static int is_passthrough = 0;
static int omit_svs;
static int indicator_used[INDICATORS_PER_CACHELINE];
static __u32 * volatile indicators;
static __u32 volatile spare_indicator;
static atomic_t spare_indicator_usecount;
#define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
static mempool_t *qdio_mempool_scssc;
static struct kmem_cache *qdio_q_cache;
static debug_info_t *qdio_dbf_setup;
static debug_info_t *qdio_dbf_sbal;
static debug_info_t *qdio_dbf_trace;
static debug_info_t *qdio_dbf_sense;
#ifdef CONFIG_QDIO_DEBUG
static debug_info_t *qdio_dbf_slsb_out;
static debug_info_t *qdio_dbf_slsb_in;
#endif /* CONFIG_QDIO_DEBUG */
/* iQDIO stuff: */
static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
during a while loop */
static DEFINE_SPINLOCK(ttiq_list_lock);
static void *tiqdio_ind;
static void tiqdio_tl(unsigned long);
static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
/* not a macro, as one of the arguments is atomic_read */
static inline int
qdio_min(int a,int b)
{
if (a<b)
return a;
else
return b;
}
/***************** SCRUBBER HELPER ROUTINES **********************/
#ifdef CONFIG_64BIT
static inline void qdio_perf_stat_inc(atomic64_t *count)
{
if (qdio_performance_stats)
atomic64_inc(count);
}
static inline void qdio_perf_stat_dec(atomic64_t *count)
{
if (qdio_performance_stats)
atomic64_dec(count);
}
#else /* CONFIG_64BIT */
static inline void qdio_perf_stat_inc(atomic_t *count)
{
if (qdio_performance_stats)
atomic_inc(count);
}
static inline void qdio_perf_stat_dec(atomic_t *count)
{
if (qdio_performance_stats)
atomic_dec(count);
}
#endif /* CONFIG_64BIT */
static inline __u64
qdio_get_micros(void)
{
return (get_clock() >> 12); /* time>>12 is microseconds */
}
/*
* unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
* the q in any case, so that we'll not be interrupted when we are in
* qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
* ever works (last famous words)
*/
static inline int
qdio_reserve_q(struct qdio_q *q)
{
return atomic_add_return(1,&q->use_count) - 1;
}
static inline void
qdio_release_q(struct qdio_q *q)
{
atomic_dec(&q->use_count);
}
/*check ccq */
static int
qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
{
char dbf_text[15];
if (ccq == 0 || ccq == 32)
return 0;
if (ccq == 96 || ccq == 97)
return 1;
/*notify devices immediately*/
sprintf(dbf_text,"%d", ccq);
QDIO_DBF_TEXT2(1,trace,dbf_text);
return -EIO;
}
/* EQBS: extract buffer states */
static int
qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
unsigned int *start, unsigned int *cnt)
{
struct qdio_irq *irq;
unsigned int tmp_cnt, q_no, ccq;
int rc ;
char dbf_text[15];
ccq = 0;
tmp_cnt = *cnt;
irq = (struct qdio_irq*)q->irq_ptr;
q_no = q->q_no;
if(!q->is_input_q)
q_no += irq->no_input_qs;
again:
ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
rc = qdio_check_ccq(q, ccq);
if ((ccq == 96) && (tmp_cnt != *cnt))
rc = 0;
if (rc == 1) {
QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
goto again;
}
if (rc < 0) {
QDIO_DBF_TEXT2(1,trace,"eqberr");
sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
QDIO_DBF_TEXT2(1,trace,dbf_text);
q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
QDIO_STATUS_LOOK_FOR_ERROR,
0, 0, 0, -1, -1, q->int_parm);
return 0;
}
return (tmp_cnt - *cnt);
}
/* SQBS: set buffer states */
static int
qdio_do_sqbs(struct qdio_q *q, unsigned char state,
unsigned int *start, unsigned int *cnt)
{
struct qdio_irq *irq;
unsigned int tmp_cnt, q_no, ccq;
int rc;
char dbf_text[15];
ccq = 0;
tmp_cnt = *cnt;
irq = (struct qdio_irq*)q->irq_ptr;
q_no = q->q_no;
if(!q->is_input_q)
q_no += irq->no_input_qs;
again:
ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
rc = qdio_check_ccq(q, ccq);
if (rc == 1) {
QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
goto again;
}
if (rc < 0) {
QDIO_DBF_TEXT3(1,trace,"sqberr");
sprintf(dbf_text,"%2x,%2x",tmp_cnt,*cnt);
QDIO_DBF_TEXT3(1,trace,dbf_text);
sprintf(dbf_text,"%d,%d",ccq,q_no);
QDIO_DBF_TEXT3(1,trace,dbf_text);
q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
QDIO_STATUS_LOOK_FOR_ERROR,
0, 0, 0, -1, -1, q->int_parm);
return 0;
}
return (tmp_cnt - *cnt);
}
static inline int
qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
unsigned char state, unsigned int *count)
{
volatile char *slsb;
struct qdio_irq *irq;
irq = (struct qdio_irq*)q->irq_ptr;
if (!irq->is_qebsm) {
slsb = (char *)&q->slsb.acc.val[(*bufno)];
xchg(slsb, state);
return 1;
}
return qdio_do_sqbs(q, state, bufno, count);
}
#ifdef CONFIG_QDIO_DEBUG
static inline void
qdio_trace_slsb(struct qdio_q *q)
{
if (q->queue_type==QDIO_TRACE_QTYPE) {
if (q->is_input_q)
QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
QDIO_MAX_BUFFERS_PER_Q);
else
QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
QDIO_MAX_BUFFERS_PER_Q);
}
}
#endif
static inline int
set_slsb(struct qdio_q *q, unsigned int *bufno,
unsigned char state, unsigned int *count)
{
int rc;
#ifdef CONFIG_QDIO_DEBUG
qdio_trace_slsb(q);
#endif
rc = qdio_set_slsb(q, bufno, state, count);
#ifdef CONFIG_QDIO_DEBUG
qdio_trace_slsb(q);
#endif
return rc;
}
static inline int
qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
unsigned int gpr3)
{
int cc;
QDIO_DBF_TEXT4(0,trace,"sigasync");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
qdio_perf_stat_inc(&perf_stats.siga_syncs);
cc = do_siga_sync(q->schid, gpr2, gpr3);
if (cc)
QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
return cc;
}
static inline int
qdio_siga_sync_q(struct qdio_q *q)
{
if (q->is_input_q)
return qdio_siga_sync(q, 0, q->mask);
return qdio_siga_sync(q, q->mask, 0);
}
static int
__do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
{
struct qdio_irq *irq;
unsigned int fc = 0;
unsigned long schid;
irq = (struct qdio_irq *) q->irq_ptr;
if (!irq->is_qebsm)
schid = *((u32 *)&q->schid);
else {
schid = irq->sch_token;
fc |= 0x80;
}
return do_siga_output(schid, q->mask, busy_bit, fc);
}
/*
* returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
* an access exception
*/
static int
qdio_siga_output(struct qdio_q *q)
{
int cc;
__u32 busy_bit;
__u64 start_time=0;
qdio_perf_stat_inc(&perf_stats.siga_outs);
QDIO_DBF_TEXT4(0,trace,"sigaout");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
for (;;) {
cc = __do_siga_output(q, &busy_bit);
//QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
if (!start_time)
start_time=NOW;
if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
break;
} else
break;
}
if ((cc==2) && (busy_bit))
cc |= QDIO_SIGA_ERROR_B_BIT_SET;
if (cc)
QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
return cc;
}
static int
qdio_siga_input(struct qdio_q *q)
{
int cc;
QDIO_DBF_TEXT4(0,trace,"sigain");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
qdio_perf_stat_inc(&perf_stats.siga_ins);
cc = do_siga_input(q->schid, q->mask);
if (cc)
QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
return cc;
}
/* locked by the locks in qdio_activate and qdio_cleanup */
static __u32 *
qdio_get_indicator(void)
{
int i;
for (i = 0; i < INDICATORS_PER_CACHELINE; i++)
if (!indicator_used[i]) {
indicator_used[i]=1;
return indicators+i;
}
atomic_inc(&spare_indicator_usecount);
return (__u32 * volatile) &spare_indicator;
}
/* locked by the locks in qdio_activate and qdio_cleanup */
static void
qdio_put_indicator(__u32 *addr)
{
int i;
if ( (addr) && (addr!=&spare_indicator) ) {
i=addr-indicators;
indicator_used[i]=0;
}
if (addr == &spare_indicator)
atomic_dec(&spare_indicator_usecount);
}
static inline void
tiqdio_clear_summary_bit(__u32 *location)
{
QDIO_DBF_TEXT5(0,trace,"clrsummb");
QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
xchg(location,0);
}
static inline void
tiqdio_set_summary_bit(__u32 *location)
{
QDIO_DBF_TEXT5(0,trace,"setsummb");
QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
xchg(location,-1);
}
static inline void
tiqdio_sched_tl(void)
{
tasklet_hi_schedule(&tiqdio_tasklet);
}
static void
qdio_mark_tiq(struct qdio_q *q)
{
unsigned long flags;
QDIO_DBF_TEXT4(0,trace,"mark iq");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
spin_lock_irqsave(&ttiq_list_lock,flags);
if (unlikely(atomic_read(&q->is_in_shutdown)))
goto out_unlock;
if (!q->is_input_q)
goto out_unlock;
if ((q->list_prev) || (q->list_next))
goto out_unlock;
if (!tiq_list) {
tiq_list=q;
q->list_prev=q;
q->list_next=q;
} else {
q->list_next=tiq_list;
q->list_prev=tiq_list->list_prev;
tiq_list->list_prev->list_next=q;
tiq_list->list_prev=q;
}
spin_unlock_irqrestore(&ttiq_list_lock,flags);
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
return;
out_unlock:
spin_unlock_irqrestore(&ttiq_list_lock,flags);
return;
}
static inline void
qdio_mark_q(struct qdio_q *q)
{
QDIO_DBF_TEXT4(0,trace,"mark q");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
if (unlikely(atomic_read(&q->is_in_shutdown)))
return;
tasklet_schedule(&q->tasklet);
}
static int
qdio_stop_polling(struct qdio_q *q)
{
#ifdef QDIO_USE_PROCESSING_STATE
unsigned int tmp, gsf, count = 1;
unsigned char state = 0;
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
if (!atomic_xchg(&q->polling,0))
return 1;
QDIO_DBF_TEXT4(0,trace,"stoppoll");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
/* show the card that we are not polling anymore */
if (!q->is_input_q)
return 1;
tmp = gsf = GET_SAVED_FRONTIER(q);
tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
/*
* we don't issue this SYNC_MEMORY, as we trust Rick T and
* moreover will not use the PROCESSING state under VM, so
* q->polling was 0 anyway
*/
/*SYNC_MEMORY;*/
if (irq->is_qebsm) {
count = 1;
qdio_do_eqbs(q, &state, &gsf, &count);
} else
state = q->slsb.acc.val[gsf];
if (state != SLSB_P_INPUT_PRIMED)
return 1;
/*
* set our summary bit again, as otherwise there is a
* small window we can miss between resetting it and
* checking for PRIMED state
*/
if (q->is_thinint_q)
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
return 0;
#else /* QDIO_USE_PROCESSING_STATE */
return 1;
#endif /* QDIO_USE_PROCESSING_STATE */
}
/*
* see the comment in do_QDIO and before qdio_reserve_q about the
* sophisticated locking outside of unmark_q, so that we don't need to
* disable the interrupts :-)
*/
static void
qdio_unmark_q(struct qdio_q *q)
{
unsigned long flags;
QDIO_DBF_TEXT4(0,trace,"unmark q");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
if ((!q->list_prev)||(!q->list_next))
return;
if ((q->is_thinint_q)&&(q->is_input_q)) {
/* iQDIO */
spin_lock_irqsave(&ttiq_list_lock,flags);
/* in case cleanup has done this already and simultanously
* qdio_unmark_q is called from the interrupt handler, we've
* got to check this in this specific case again */
if ((!q->list_prev)||(!q->list_next))
goto out;
if (q->list_next==q) {
/* q was the only interesting q */
tiq_list=NULL;
q->list_next=NULL;
q->list_prev=NULL;
} else {
q->list_next->list_prev=q->list_prev;
q->list_prev->list_next=q->list_next;
tiq_list=q->list_next;
q->list_next=NULL;
q->list_prev=NULL;
}
out:
spin_unlock_irqrestore(&ttiq_list_lock,flags);
}
}
static inline unsigned long
tiqdio_clear_global_summary(void)
{
unsigned long time;
QDIO_DBF_TEXT5(0,trace,"clrglobl");
time = do_clear_global_summary();
QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
return time;
}
/************************* OUTBOUND ROUTINES *******************************/
static int
qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
{
struct qdio_irq *irq;
unsigned char state;
unsigned int cnt, count, ftc;
irq = (struct qdio_irq *) q->irq_ptr;
if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
SYNC_MEMORY;
ftc = q->first_to_check;
count = qdio_min(atomic_read(&q->number_of_buffers_used),
(QDIO_MAX_BUFFERS_PER_Q-1));
if (count == 0)
return q->first_to_check;
cnt = qdio_do_eqbs(q, &state, &ftc, &count);
if (cnt == 0)
return q->first_to_check;
switch (state) {
case SLSB_P_OUTPUT_ERROR:
QDIO_DBF_TEXT3(0,trace,"outperr");
atomic_sub(cnt , &q->number_of_buffers_used);
if (q->qdio_error)
q->error_status_flags |=
QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
q->qdio_error = SLSB_P_OUTPUT_ERROR;
q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
q->first_to_check = ftc;
break;
case SLSB_P_OUTPUT_EMPTY:
QDIO_DBF_TEXT5(0,trace,"outpempt");
atomic_sub(cnt, &q->number_of_buffers_used);
q->first_to_check = ftc;
break;
case SLSB_CU_OUTPUT_PRIMED:
/* all buffers primed */
QDIO_DBF_TEXT5(0,trace,"outpprim");
break;
default:
break;
}
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
return q->first_to_check;
}
static int
qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
{
struct qdio_irq *irq;
unsigned char state;
int tmp, ftc, count, cnt;
char dbf_text[15];
irq = (struct qdio_irq *) q->irq_ptr;
ftc = q->first_to_check;
count = qdio_min(atomic_read(&q->number_of_buffers_used),
(QDIO_MAX_BUFFERS_PER_Q-1));
if (count == 0)
return q->first_to_check;
cnt = qdio_do_eqbs(q, &state, &ftc, &count);
if (cnt == 0)
return q->first_to_check;
switch (state) {
case SLSB_P_INPUT_ERROR :
#ifdef CONFIG_QDIO_DEBUG
QDIO_DBF_TEXT3(1,trace,"inperr");
sprintf(dbf_text,"%2x,%2x",ftc,count);
QDIO_DBF_TEXT3(1,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
if (q->qdio_error)
q->error_status_flags |=
QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
q->qdio_error = SLSB_P_INPUT_ERROR;
q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
atomic_sub(cnt, &q->number_of_buffers_used);
q->first_to_check = ftc;
break;
case SLSB_P_INPUT_PRIMED :
QDIO_DBF_TEXT3(0,trace,"inptprim");
sprintf(dbf_text,"%2x,%2x",ftc,count);
QDIO_DBF_TEXT3(1,trace,dbf_text);
tmp = 0;
ftc = q->first_to_check;
#ifdef QDIO_USE_PROCESSING_STATE
if (cnt > 1) {
cnt -= 1;
tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
if (!tmp)
break;
}
cnt = 1;
tmp += set_slsb(q, &ftc,
SLSB_P_INPUT_PROCESSING, &cnt);
atomic_set(&q->polling, 1);
#else
tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
#endif
atomic_sub(tmp, &q->number_of_buffers_used);
q->first_to_check = ftc;
break;
case SLSB_CU_INPUT_EMPTY:
case SLSB_P_INPUT_NOT_INIT:
case SLSB_P_INPUT_PROCESSING:
QDIO_DBF_TEXT5(0,trace,"inpnipro");
break;
default:
break;
}
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
return q->first_to_check;
}
static int
qdio_get_outbound_buffer_frontier(struct qdio_q *q)
{
struct qdio_irq *irq;
volatile char *slsb;
unsigned int count = 1;
int first_not_to_check, f, f_mod_no;
char dbf_text[15];
QDIO_DBF_TEXT4(0,trace,"getobfro");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
irq = (struct qdio_irq *) q->irq_ptr;
if (irq->is_qebsm)
return qdio_qebsm_get_outbound_buffer_frontier(q);
slsb=&q->slsb.acc.val[0];
f_mod_no=f=q->first_to_check;
/*
* f points to already processed elements, so f+no_used is correct...
* ... but: we don't check 128 buffers, as otherwise
* qdio_has_outbound_q_moved would return 0
*/
first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
(QDIO_MAX_BUFFERS_PER_Q-1));
if (((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis)) ||
(q->queue_type == QDIO_IQDIO_QFMT_ASYNCH))
SYNC_MEMORY;
check_next:
if (f==first_not_to_check)
goto out;
switch(slsb[f_mod_no]) {
/* the adapter has not fetched the output yet */
case SLSB_CU_OUTPUT_PRIMED:
QDIO_DBF_TEXT5(0,trace,"outpprim");
break;
/* the adapter got it */
case SLSB_P_OUTPUT_EMPTY:
atomic_dec(&q->number_of_buffers_used);
f++;
f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
QDIO_DBF_TEXT5(0,trace,"outpempt");
goto check_next;
case SLSB_P_OUTPUT_ERROR:
QDIO_DBF_TEXT3(0,trace,"outperr");
sprintf(dbf_text,"%x-%x-%x",f_mod_no,
q->sbal[f_mod_no]->element[14].sbalf.value,
q->sbal[f_mod_no]->element[15].sbalf.value);
QDIO_DBF_TEXT3(1,trace,dbf_text);
QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
/* kind of process the buffer */
set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
/*
* we increment the frontier, as this buffer
* was processed obviously
*/
atomic_dec(&q->number_of_buffers_used);
f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
if (q->qdio_error)
q->error_status_flags|=
QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
q->qdio_error=SLSB_P_OUTPUT_ERROR;
q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
break;
/* no new buffers */
default:
QDIO_DBF_TEXT5(0,trace,"outpni");
}
out:
return (q->first_to_check=f_mod_no);
}
/* all buffers are processed */
static int
qdio_is_outbound_q_done(struct qdio_q *q)
{
int no_used;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
#endif
no_used=atomic_read(&q->number_of_buffers_used);
#ifdef CONFIG_QDIO_DEBUG
if (no_used) {
sprintf(dbf_text,"oqisnt%02x",no_used);
QDIO_DBF_TEXT4(0,trace,dbf_text);
} else {
QDIO_DBF_TEXT4(0,trace,"oqisdone");
}
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* CONFIG_QDIO_DEBUG */
return (no_used==0);
}
static int
qdio_has_outbound_q_moved(struct qdio_q *q)
{
int i;
i=qdio_get_outbound_buffer_frontier(q);
if ( (i!=GET_SAVED_FRONTIER(q)) ||
(q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
SAVE_FRONTIER(q,i);
QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
return 1;
} else {
QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
return 0;
}
}
static void
qdio_kick_outbound_q(struct qdio_q *q)
{
int result;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
QDIO_DBF_TEXT4(0,trace,"kickoutq");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* CONFIG_QDIO_DEBUG */
if (!q->siga_out)
return;
/* here's the story with cc=2 and busy bit set (thanks, Rick):
* VM's CP could present us cc=2 and busy bit set on SIGA-write
* during reconfiguration of their Guest LAN (only in HIPERS mode,
* QDIO mode is asynchronous -- cc=2 and busy bit there will take
* the queues down immediately; and not being under VM we have a
* problem on cc=2 and busy bit set right away).
*
* Therefore qdio_siga_output will try for a short time constantly,
* if such a condition occurs. If it doesn't change, it will
* increase the busy_siga_counter and save the timestamp, and
* schedule the queue for later processing (via mark_q, using the
* queue tasklet). __qdio_outbound_processing will check out the
* counter. If non-zero, it will call qdio_kick_outbound_q as often
* as the value of the counter. This will attempt further SIGA
* instructions. For each successful SIGA, the counter is
* decreased, for failing SIGAs the counter remains the same, after
* all.
* After some time of no movement, qdio_kick_outbound_q will
* finally fail and reflect corresponding error codes to call
* the upper layer module and have it take the queues down.
*
* Note that this is a change from the original HiperSockets design
* (saying cc=2 and busy bit means take the queues down), but in
* these days Guest LAN didn't exist... excessive cc=2 with busy bit
* conditions will still take the queues down, but the threshold is
* higher due to the Guest LAN environment.
*/
result=qdio_siga_output(q);
switch (result) {
case 0:
/* went smooth this time, reset timestamp */
#ifdef CONFIG_QDIO_DEBUG
QDIO_DBF_TEXT3(0,trace,"cc2reslv");
sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
atomic_read(&q->busy_siga_counter));
QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
q->timing.busy_start=0;
break;
case (2|QDIO_SIGA_ERROR_B_BIT_SET):
/* cc=2 and busy bit: */
atomic_inc(&q->busy_siga_counter);
/* if the last siga was successful, save
* timestamp here */
if (!q->timing.busy_start)
q->timing.busy_start=NOW;
/* if we're in time, don't touch error_status_flags
* and siga_error */
if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
qdio_mark_q(q);
break;
}
QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
#ifdef CONFIG_QDIO_DEBUG
sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
atomic_read(&q->busy_siga_counter));
QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
/* else fallthrough and report error */
default:
/* for plain cc=1, 2 or 3: */
if (q->siga_error)
q->error_status_flags|=
QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
q->error_status_flags|=
QDIO_STATUS_LOOK_FOR_ERROR;
q->siga_error=result;
}
}
static void
qdio_kick_outbound_handler(struct qdio_q *q)
{
int start, end, real_end, count;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
#endif
start = q->first_element_to_kick;
/* last_move_ftc was just updated */
real_end = GET_SAVED_FRONTIER(q);
end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
(QDIO_MAX_BUFFERS_PER_Q-1);
count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
(QDIO_MAX_BUFFERS_PER_Q-1);
#ifdef CONFIG_QDIO_DEBUG
QDIO_DBF_TEXT4(0,trace,"kickouth");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
sprintf(dbf_text,"s=%2xc=%2x",start,count);
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
if (q->state==QDIO_IRQ_STATE_ACTIVE)
q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
q->error_status_flags,
q->qdio_error,q->siga_error,q->q_no,start,count,
q->int_parm);
/* for the next time: */
q->first_element_to_kick=real_end;
q->qdio_error=0;
q->siga_error=0;
q->error_status_flags=0;
}
static void
__qdio_outbound_processing(struct qdio_q *q)
{
int siga_attempts;
QDIO_DBF_TEXT4(0,trace,"qoutproc");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
/* as we're sissies, we'll check next time */
if (likely(!atomic_read(&q->is_in_shutdown))) {
qdio_mark_q(q);
QDIO_DBF_TEXT4(0,trace,"busy,agn");
}
return;
}
qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
qdio_perf_stat_inc(&perf_stats.tl_runs);
/* see comment in qdio_kick_outbound_q */
siga_attempts=atomic_read(&q->busy_siga_counter);
while (siga_attempts) {
atomic_dec(&q->busy_siga_counter);
qdio_kick_outbound_q(q);
siga_attempts--;
}
if (qdio_has_outbound_q_moved(q))
qdio_kick_outbound_handler(q);
if (q->queue_type == QDIO_ZFCP_QFMT) {
if ((!q->hydra_gives_outbound_pcis) &&
(!qdio_is_outbound_q_done(q)))
qdio_mark_q(q);
}
else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
(q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
/*
* make sure buffer switch from PRIMED to EMPTY is noticed
* and outbound_handler is called
*/
if (qdio_is_outbound_q_done(q)) {
del_timer(&q->timer);
} else {
if (!timer_pending(&q->timer))
mod_timer(&q->timer, jiffies +
QDIO_FORCE_CHECK_TIMEOUT);
}
}
qdio_release_q(q);
}
static void
qdio_outbound_processing(unsigned long q)
{
__qdio_outbound_processing((struct qdio_q *) q);
}
/************************* INBOUND ROUTINES *******************************/
static int
qdio_get_inbound_buffer_frontier(struct qdio_q *q)
{
struct qdio_irq *irq;
int f,f_mod_no;
volatile char *slsb;
unsigned int count = 1;
int first_not_to_check;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
#endif /* CONFIG_QDIO_DEBUG */
#ifdef QDIO_USE_PROCESSING_STATE
int last_position=-1;
#endif /* QDIO_USE_PROCESSING_STATE */
QDIO_DBF_TEXT4(0,trace,"getibfro");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
irq = (struct qdio_irq *) q->irq_ptr;
if (irq->is_qebsm)
return qdio_qebsm_get_inbound_buffer_frontier(q);
slsb=&q->slsb.acc.val[0];
f_mod_no=f=q->first_to_check;
/*
* we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
* would return 0
*/
first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
(QDIO_MAX_BUFFERS_PER_Q-1));
/*
* we don't use this one, as a PCI or we after a thin interrupt
* will sync the queues
*/
/* SYNC_MEMORY;*/
check_next:
f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
if (f==first_not_to_check)
goto out;
switch (slsb[f_mod_no]) {
/* CU_EMPTY means frontier is reached */
case SLSB_CU_INPUT_EMPTY:
QDIO_DBF_TEXT5(0,trace,"inptempt");
break;
/* P_PRIMED means set slsb to P_PROCESSING and move on */
case SLSB_P_INPUT_PRIMED:
QDIO_DBF_TEXT5(0,trace,"inptprim");
#ifdef QDIO_USE_PROCESSING_STATE
/*
* as soon as running under VM, polling the input queues will
* kill VM in terms of CP overhead
*/
if (q->siga_sync) {
set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
} else {
/* set the previous buffer to NOT_INIT. The current
* buffer will be set to PROCESSING at the end of
* this function to avoid further interrupts. */
if (last_position>=0)
set_slsb(q, &last_position,
SLSB_P_INPUT_NOT_INIT, &count);
atomic_set(&q->polling,1);
last_position=f_mod_no;
}
#else /* QDIO_USE_PROCESSING_STATE */
set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
#endif /* QDIO_USE_PROCESSING_STATE */
/*
* not needed, as the inbound queue will be synced on the next
* siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
*/
/*SYNC_MEMORY;*/
f++;
atomic_dec(&q->number_of_buffers_used);
goto check_next;
case SLSB_P_INPUT_NOT_INIT:
case SLSB_P_INPUT_PROCESSING:
QDIO_DBF_TEXT5(0,trace,"inpnipro");
break;
/* P_ERROR means frontier is reached, break and report error */
case SLSB_P_INPUT_ERROR:
#ifdef CONFIG_QDIO_DEBUG
sprintf(dbf_text,"inperr%2x",f_mod_no);
QDIO_DBF_TEXT3(1,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
/* kind of process the buffer */
set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
if (q->qdio_error)
q->error_status_flags|=
QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
q->qdio_error=SLSB_P_INPUT_ERROR;
q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
/* we increment the frontier, as this buffer
* was processed obviously */
f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
atomic_dec(&q->number_of_buffers_used);
#ifdef QDIO_USE_PROCESSING_STATE
last_position=-1;
#endif /* QDIO_USE_PROCESSING_STATE */
break;
/* everything else means frontier not changed (HALTED or so) */
default:
break;
}
out:
q->first_to_check=f_mod_no;
#ifdef QDIO_USE_PROCESSING_STATE
if (last_position>=0)
set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
#endif /* QDIO_USE_PROCESSING_STATE */
QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
return q->first_to_check;
}
static int
qdio_has_inbound_q_moved(struct qdio_q *q)
{
int i;
i=qdio_get_inbound_buffer_frontier(q);
if ( (i!=GET_SAVED_FRONTIER(q)) ||
(q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
SAVE_FRONTIER(q,i);
if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
SAVE_TIMESTAMP(q);
QDIO_DBF_TEXT4(0,trace,"inhasmvd");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
return 1;
} else {
QDIO_DBF_TEXT4(0,trace,"inhsntmv");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
return 0;
}
}
/* means, no more buffers to be filled */
static int
tiqdio_is_inbound_q_done(struct qdio_q *q)
{
int no_used;
unsigned int start_buf, count;
unsigned char state = 0;
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
#endif
no_used=atomic_read(&q->number_of_buffers_used);
/* propagate the change from 82 to 80 through VM */
SYNC_MEMORY;
#ifdef CONFIG_QDIO_DEBUG
if (no_used) {
sprintf(dbf_text,"iqisnt%02x",no_used);
QDIO_DBF_TEXT4(0,trace,dbf_text);
} else {
QDIO_DBF_TEXT4(0,trace,"iniqisdo");
}
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* CONFIG_QDIO_DEBUG */
if (!no_used)
return 1;
if (irq->is_qebsm) {
count = 1;
start_buf = q->first_to_check;
qdio_do_eqbs(q, &state, &start_buf, &count);
} else
state = q->slsb.acc.val[q->first_to_check];
if (state != SLSB_P_INPUT_PRIMED)
/*
* nothing more to do, if next buffer is not PRIMED.
* note that we did a SYNC_MEMORY before, that there
* has been a sychnronization.
* we will return 0 below, as there is nothing to do
* (stop_polling not necessary, as we have not been
* using the PROCESSING state
*/
return 0;
/*
* ok, the next input buffer is primed. that means, that device state
* change indicator and adapter local summary are set, so we will find
* it next time.
* we will return 0 below, as there is nothing to do, except scheduling
* ourselves for the next time.
*/
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
return 0;
}
static int
qdio_is_inbound_q_done(struct qdio_q *q)
{
int no_used;
unsigned int start_buf, count;
unsigned char state = 0;
struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
#endif
no_used=atomic_read(&q->number_of_buffers_used);
/*
* we need that one for synchronization with the adapter, as it
* does a kind of PCI avoidance
*/
SYNC_MEMORY;
if (!no_used) {
QDIO_DBF_TEXT4(0,trace,"inqisdnA");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
return 1;
}
if (irq->is_qebsm) {
count = 1;
start_buf = q->first_to_check;
qdio_do_eqbs(q, &state, &start_buf, &count);
} else
state = q->slsb.acc.val[q->first_to_check];
if (state == SLSB_P_INPUT_PRIMED) {
/* we got something to do */
QDIO_DBF_TEXT4(0,trace,"inqisntA");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
return 0;
}
/* on VM, we don't poll, so the q is always done here */
if (q->siga_sync)
return 1;
if (q->hydra_gives_outbound_pcis)
return 1;
/*
* at this point we know, that inbound first_to_check
* has (probably) not moved (see qdio_inbound_processing)
*/
if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
#ifdef CONFIG_QDIO_DEBUG
QDIO_DBF_TEXT4(0,trace,"inqisdon");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
return 1;
} else {
#ifdef CONFIG_QDIO_DEBUG
QDIO_DBF_TEXT4(0,trace,"inqisntd");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
return 0;
}
}
static void
qdio_kick_inbound_handler(struct qdio_q *q)
{
int count, start, end, real_end, i;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
#endif
QDIO_DBF_TEXT4(0,trace,"kickinh");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
start=q->first_element_to_kick;
real_end=q->first_to_check;
end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
i=start;
count=0;
while (1) {
count++;
if (i==end)
break;
i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
}
#ifdef CONFIG_QDIO_DEBUG
sprintf(dbf_text,"s=%2xc=%2x",start,count);
QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
q->handler(q->cdev,
QDIO_STATUS_INBOUND_INT|q->error_status_flags,
q->qdio_error,q->siga_error,q->q_no,start,count,
q->int_parm);
/* for the next time: */
q->first_element_to_kick=real_end;
q->qdio_error=0;
q->siga_error=0;
q->error_status_flags=0;
qdio_perf_stat_inc(&perf_stats.inbound_cnt);
}
static void
__tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
{
struct qdio_irq *irq_ptr;
struct qdio_q *oq;
int i;
QDIO_DBF_TEXT4(0,trace,"iqinproc");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
/*
* we first want to reserve the q, so that we know, that we don't
* interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
* be set
*/
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
/*
* as we might just be about to stop polling, we make
* sure that we check again at least once more
*/
tiqdio_sched_tl();
return;
}
qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
if (unlikely(atomic_read(&q->is_in_shutdown))) {
qdio_unmark_q(q);
goto out;
}
/*
* we reset spare_ind_was_set, when the queue does not use the
* spare indicator
*/
if (spare_ind_was_set)
spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
goto out;
/*
* q->dev_st_chg_ind is the indicator, be it shared or not.
* only clear it, if indicator is non-shared
*/
if (!spare_ind_was_set)
tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
if (q->hydra_gives_outbound_pcis) {
if (!q->siga_sync_done_on_thinints) {
SYNC_MEMORY_ALL;
} else if (!q->siga_sync_done_on_outb_tis) {
SYNC_MEMORY_ALL_OUTB;
}
} else {
SYNC_MEMORY;
}
/*
* maybe we have to do work on our outbound queues... at least
* we have to check the outbound-int-capable thinint-capable
* queues
*/
if (q->hydra_gives_outbound_pcis) {
irq_ptr = (struct qdio_irq*)q->irq_ptr;
for (i=0;i<irq_ptr->no_output_qs;i++) {
oq = irq_ptr->output_qs[i];
if (!qdio_is_outbound_q_done(oq)) {
qdio_perf_stat_dec(&perf_stats.tl_runs);
__qdio_outbound_processing(oq);
}
}
}
if (!qdio_has_inbound_q_moved(q))
goto out;
qdio_kick_inbound_handler(q);
if (tiqdio_is_inbound_q_done(q))
if (!qdio_stop_polling(q)) {
/*
* we set the flags to get into the stuff next time,
* see also comment in qdio_stop_polling
*/
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
}
out:
qdio_release_q(q);
}
static void
tiqdio_inbound_processing(unsigned long q)
{
__tiqdio_inbound_processing((struct qdio_q *) q,
atomic_read(&spare_indicator_usecount));
}
static void
__qdio_inbound_processing(struct qdio_q *q)
{
int q_laps=0;
QDIO_DBF_TEXT4(0,trace,"qinproc");
QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
/* as we're sissies, we'll check next time */
if (likely(!atomic_read(&q->is_in_shutdown))) {
qdio_mark_q(q);
QDIO_DBF_TEXT4(0,trace,"busy,agn");
}
return;
}
qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
qdio_perf_stat_inc(&perf_stats.tl_runs);
again:
if (qdio_has_inbound_q_moved(q)) {
qdio_kick_inbound_handler(q);
if (!qdio_stop_polling(q)) {
q_laps++;
if (q_laps<QDIO_Q_LAPS)
goto again;
}
qdio_mark_q(q);
} else {
if (!qdio_is_inbound_q_done(q))
/* means poll time is not yet over */
qdio_mark_q(q);
}
qdio_release_q(q);
}
static void
qdio_inbound_processing(unsigned long q)
{
__qdio_inbound_processing((struct qdio_q *) q);
}
/************************* MAIN ROUTINES *******************************/
#ifdef QDIO_USE_PROCESSING_STATE
static int
tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
{
if (!q) {
tiqdio_sched_tl();
return 0;
}
/*
* under VM, we have not used the PROCESSING state, so no
* need to stop polling
*/
if (q->siga_sync)
return 2;
if (unlikely(qdio_reserve_q(q))) {
qdio_release_q(q);
qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
/*
* as we might just be about to stop polling, we make
* sure that we check again at least once more
*/
/*
* sanity -- we'd get here without setting the
* dev st chg ind
*/
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
return 0;
}
if (qdio_stop_polling(q)) {
qdio_release_q(q);
return 2;
}
if (q_laps<QDIO_Q_LAPS-1) {
qdio_release_q(q);
return 3;
}
/*
* we set the flags to get into the stuff
* next time, see also comment in qdio_stop_polling
*/
tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
tiqdio_sched_tl();
qdio_release_q(q);
return 1;
}
#endif /* QDIO_USE_PROCESSING_STATE */
static void
tiqdio_inbound_checks(void)
{
struct qdio_q *q;
int spare_ind_was_set=0;
#ifdef QDIO_USE_PROCESSING_STATE
int q_laps=0;
#endif /* QDIO_USE_PROCESSING_STATE */
QDIO_DBF_TEXT4(0,trace,"iqdinbck");
QDIO_DBF_TEXT5(0,trace,"iqlocsum");
#ifdef QDIO_USE_PROCESSING_STATE
again:
#endif /* QDIO_USE_PROCESSING_STATE */
/* when the spare indicator is used and set, save that and clear it */
if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
spare_ind_was_set = 1;
tiqdio_clear_summary_bit((__u32*)&spare_indicator);
}
q=(struct qdio_q*)tiq_list;
do {
if (!q)
break;
__tiqdio_inbound_processing(q, spare_ind_was_set);
q=(struct qdio_q*)q->list_next;
} while (q!=(struct qdio_q*)tiq_list);
#ifdef QDIO_USE_PROCESSING_STATE
q=(struct qdio_q*)tiq_list;
do {
int ret;
ret = tiqdio_reset_processing_state(q, q_laps);
switch (ret) {
case 0:
return;
case 1:
q_laps++;
case 2:
q = (struct qdio_q*)q->list_next;
break;
default:
q_laps++;
goto again;
}
} while (q!=(struct qdio_q*)tiq_list);
#endif /* QDIO_USE_PROCESSING_STATE */
}
static void
tiqdio_tl(unsigned long data)
{
QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
qdio_perf_stat_inc(&perf_stats.tl_runs);
tiqdio_inbound_checks();
}
/********************* GENERAL HELPER_ROUTINES ***********************/
static void
qdio_release_irq_memory(struct qdio_irq *irq_ptr)
{
int i;
struct qdio_q *q;
for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
q = irq_ptr->input_qs[i];
if (q) {
free_page((unsigned long) q->slib);
kmem_cache_free(qdio_q_cache, q);
}
q = irq_ptr->output_qs[i];
if (q) {
free_page((unsigned long) q->slib);
kmem_cache_free(qdio_q_cache, q);
}
}
free_page((unsigned long) irq_ptr->qdr);
free_page((unsigned long) irq_ptr);
}
static void
qdio_set_impl_params(struct qdio_irq *irq_ptr,
unsigned int qib_param_field_format,
/* pointer to 128 bytes or NULL, if no param field */
unsigned char *qib_param_field,
/* pointer to no_queues*128 words of data or NULL */
unsigned int no_input_qs,
unsigned int no_output_qs,
unsigned long *input_slib_elements,
unsigned long *output_slib_elements)
{
int i,j;
if (!irq_ptr)
return;
irq_ptr->qib.pfmt=qib_param_field_format;
if (qib_param_field)
memcpy(irq_ptr->qib.parm,qib_param_field,
QDIO_MAX_BUFFERS_PER_Q);
if (input_slib_elements)
for (i=0;i<no_input_qs;i++) {
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
irq_ptr->input_qs[i]->slib->slibe[j].parms=
input_slib_elements[
i*QDIO_MAX_BUFFERS_PER_Q+j];
}
if (output_slib_elements)
for (i=0;i<no_output_qs;i++) {
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
irq_ptr->output_qs[i]->slib->slibe[j].parms=
output_slib_elements[
i*QDIO_MAX_BUFFERS_PER_Q+j];
}
}
static int
qdio_alloc_qs(struct qdio_irq *irq_ptr,
int no_input_qs, int no_output_qs)
{
int i;
struct qdio_q *q;
for (i = 0; i < no_input_qs; i++) {
q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
if (!q)
return -ENOMEM;
memset(q, 0, sizeof(*q));
q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
if (!q->slib) {
kmem_cache_free(qdio_q_cache, q);
return -ENOMEM;
}
irq_ptr->input_qs[i]=q;
}
for (i = 0; i < no_output_qs; i++) {
q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
if (!q)
return -ENOMEM;
memset(q, 0, sizeof(*q));
q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
if (!q->slib) {
kmem_cache_free(qdio_q_cache, q);
return -ENOMEM;
}
irq_ptr->output_qs[i]=q;
}
return 0;
}
static void
qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
int no_input_qs, int no_output_qs,
qdio_handler_t *input_handler,
qdio_handler_t *output_handler,
unsigned long int_parm,int q_format,
unsigned long flags,
void **inbound_sbals_array,
void **outbound_sbals_array)
{
struct qdio_q *q;
int i,j;
char dbf_text[20]; /* see qdio_initialize */
void *ptr;
int available;
sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
QDIO_DBF_TEXT0(0,setup,dbf_text);
for (i=0;i<no_input_qs;i++) {
q=irq_ptr->input_qs[i];
memset(q,0,((char*)&q->slib)-((char*)q));
sprintf(dbf_text,"in-q%4x",i);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
memset(q->slib,0,PAGE_SIZE);
q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
available=0;
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
q->sbal[j]=*(inbound_sbals_array++);
q->queue_type=q_format;
q->int_parm=int_parm;
q->schid = irq_ptr->schid;
q->irq_ptr = irq_ptr;
q->cdev = cdev;
q->mask=1<<(31-i);
q->q_no=i;
q->is_input_q=1;
q->first_to_check=0;
q->last_move_ftc=0;
q->handler=input_handler;
q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
/* q->is_thinint_q isn't valid at this time, but
* irq_ptr->is_thinint_irq is
*/
if (irq_ptr->is_thinint_irq)
tasklet_init(&q->tasklet, tiqdio_inbound_processing,
(unsigned long) q);
else
tasklet_init(&q->tasklet, qdio_inbound_processing,
(unsigned long) q);
/* actually this is not used for inbound queues. yet. */
atomic_set(&q->busy_siga_counter,0);
q->timing.busy_start=0;
/* for (j=0;j<QDIO_STATS_NUMBER;j++)
q->timing.last_transfer_times[j]=(qdio_get_micros()/
QDIO_STATS_NUMBER)*j;
q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
*/
/* fill in slib */
if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
(unsigned long)(q->slib);
q->slib->sla=(unsigned long)(q->sl);
q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
/* fill in sl */
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
ptr=(void*)q->sl;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)&q->slsb;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)q->sbal[0];
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
/* fill in slsb */
if (!irq_ptr->is_qebsm) {
unsigned int count = 1;
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
}
}
for (i=0;i<no_output_qs;i++) {
q=irq_ptr->output_qs[i];
memset(q,0,((char*)&q->slib)-((char*)q));
sprintf(dbf_text,"outq%4x",i);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
memset(q->slib,0,PAGE_SIZE);
q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
available=0;
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
q->sbal[j]=*(outbound_sbals_array++);
q->queue_type=q_format;
if ((q->queue_type == QDIO_IQDIO_QFMT) &&
(no_output_qs > 1) &&
(i == no_output_qs-1))
q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
q->int_parm=int_parm;
q->is_input_q=0;
q->is_pci_out = 0;
q->schid = irq_ptr->schid;
q->cdev = cdev;
q->irq_ptr = irq_ptr;
q->mask=1<<(31-i);
q->q_no=i;
q->first_to_check=0;
q->last_move_ftc=0;
q->handler=output_handler;
tasklet_init(&q->tasklet, qdio_outbound_processing,
(unsigned long) q);
setup_timer(&q->timer, qdio_outbound_processing,
(unsigned long) q);
atomic_set(&q->busy_siga_counter,0);
q->timing.busy_start=0;
/* fill in slib */
if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
(unsigned long)(q->slib);
q->slib->sla=(unsigned long)(q->sl);
q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
/* fill in sl */
for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
ptr=(void*)q->sl;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)&q->slsb;
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
ptr=(void*)q->sbal[0];
QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
/* fill in slsb */
if (!irq_ptr->is_qebsm) {
unsigned int count = 1;
for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
}
}
}
static void
qdio_fill_thresholds(struct qdio_irq *irq_ptr,
unsigned int no_input_qs,
unsigned int no_output_qs,
unsigned int min_input_threshold,
unsigned int max_input_threshold,
unsigned int min_output_threshold,
unsigned int max_output_threshold)
{
int i;
struct qdio_q *q;
for (i=0;i<no_input_qs;i++) {
q=irq_ptr->input_qs[i];
q->timing.threshold=max_input_threshold;
/* for (j=0;j<QDIO_STATS_CLASSES;j++) {
q->threshold_classes[j].threshold=
min_input_threshold+
(max_input_threshold-min_input_threshold)/
QDIO_STATS_CLASSES;
}
qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
}
for (i=0;i<no_output_qs;i++) {
q=irq_ptr->output_qs[i];
q->timing.threshold=max_output_threshold;
/* for (j=0;j<QDIO_STATS_CLASSES;j++) {
q->threshold_classes[j].threshold=
min_output_threshold+
(max_output_threshold-min_output_threshold)/
QDIO_STATS_CLASSES;
}
qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
}
}
static void tiqdio_thinint_handler(void *ind, void *drv_data)
{
QDIO_DBF_TEXT4(0,trace,"thin_int");
qdio_perf_stat_inc(&perf_stats.thinints);
/* SVS only when needed:
* issue SVS to benefit from iqdio interrupt avoidance
* (SVS clears AISOI)*/
if (!omit_svs)
tiqdio_clear_global_summary();
tiqdio_inbound_checks();
}
static void
qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
{
int i;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15];
QDIO_DBF_TEXT5(0,trace,"newstate");
sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
QDIO_DBF_TEXT5(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
irq_ptr->state=state;
for (i=0;i<irq_ptr->no_input_qs;i++)
irq_ptr->input_qs[i]->state=state;
for (i=0;i<irq_ptr->no_output_qs;i++)
irq_ptr->output_qs[i]->state=state;
mb();
}
static void
qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
{
char dbf_text[15];
if (irb->esw.esw0.erw.cons) {
sprintf(dbf_text,"sens%4x",schid.sch_no);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
QDIO_PRINT_WARN("sense data available on qdio channel.\n");
QDIO_HEXDUMP16(WARN,"irb: ",irb);
QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
}
}
static void
qdio_handle_pci(struct qdio_irq *irq_ptr)
{
int i;
struct qdio_q *q;
qdio_perf_stat_inc(&perf_stats.pcis);
for (i=0;i<irq_ptr->no_input_qs;i++) {
q=irq_ptr->input_qs[i];
if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
qdio_mark_q(q);
else {
qdio_perf_stat_dec(&perf_stats.tl_runs);
__qdio_inbound_processing(q);
}
}
if (!irq_ptr->hydra_gives_outbound_pcis)
return;
for (i=0;i<irq_ptr->no_output_qs;i++) {
q=irq_ptr->output_qs[i];
if (qdio_is_outbound_q_done(q))
continue;
qdio_perf_stat_dec(&perf_stats.tl_runs);
if (!irq_ptr->sync_done_on_outb_pcis)
SYNC_MEMORY;
__qdio_outbound_processing(q);
}
}
static void qdio_establish_handle_irq(struct ccw_device*, int, int);
static void
qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
int cstat, int dstat)
{
struct qdio_irq *irq_ptr;
struct qdio_q *q;
char dbf_text[15];
irq_ptr = cdev->private->qdio_data;
QDIO_DBF_TEXT2(1, trace, "ick2");
sprintf(dbf_text,"%s", cdev->dev.bus_id);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
QDIO_PRINT_ERR("received check condition on activate " \
"queues on device %s (cs=x%x, ds=x%x).\n",
cdev->dev.bus_id, cstat, dstat);
if (irq_ptr->no_input_qs) {
q=irq_ptr->input_qs[0];
} else if (irq_ptr->no_output_qs) {
q=irq_ptr->output_qs[0];
} else {
QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
cdev->dev.bus_id);
goto omit_handler_call;
}
q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
QDIO_STATUS_LOOK_FOR_ERROR,
0,0,0,-1,-1,q->int_parm);
omit_handler_call:
qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
}
static void
qdio_call_shutdown(struct work_struct *work)
{
struct ccw_device_private *priv;
struct ccw_device *cdev;
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
put_device(&cdev->dev);
}
static void
qdio_timeout_handler(struct ccw_device *cdev)
{
struct qdio_irq *irq_ptr;
char dbf_text[15];
QDIO_DBF_TEXT2(0, trace, "qtoh");
sprintf(dbf_text, "%s", cdev->dev.bus_id);
QDIO_DBF_TEXT2(0, trace, dbf_text);
irq_ptr = cdev->private->qdio_data;
sprintf(dbf_text, "state:%d", irq_ptr->state);
QDIO_DBF_TEXT2(0, trace, dbf_text);
switch (irq_ptr->state) {
case QDIO_IRQ_STATE_INACTIVE:
QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
QDIO_DBF_TEXT2(1,setup,"eq:timeo");
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
break;
case QDIO_IRQ_STATE_CLEANUP:
QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
"irq=0.%x.%x.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
break;
case QDIO_IRQ_STATE_ESTABLISHED:
case QDIO_IRQ_STATE_ACTIVE:
/* I/O has been terminated by common I/O layer. */
QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
QDIO_DBF_TEXT2(1, trace, "cio:term");
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
if (get_device(&cdev->dev)) {
/* Can't call shutdown from interrupt context. */
PREPARE_WORK(&cdev->private->kick_work,
qdio_call_shutdown);
queue_work(ccw_device_work, &cdev->private->kick_work);
}
break;
default:
BUG();
}
ccw_device_set_timeout(cdev, 0);
wake_up(&cdev->private->wait_q);
}
static void
qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
{
struct qdio_irq *irq_ptr;
int cstat,dstat;
char dbf_text[15];
#ifdef CONFIG_QDIO_DEBUG
QDIO_DBF_TEXT4(0, trace, "qint");
sprintf(dbf_text, "%s", cdev->dev.bus_id);
QDIO_DBF_TEXT4(0, trace, dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
if (!intparm) {
QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
"handler, device %s\n", cdev->dev.bus_id);
return;
}
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr) {
QDIO_DBF_TEXT2(1, trace, "uint");
sprintf(dbf_text,"%s", cdev->dev.bus_id);
QDIO_DBF_TEXT2(1,trace,dbf_text);
QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
cdev->dev.bus_id);
return;
}
if (IS_ERR(irb)) {
/* Currently running i/o is in error. */
switch (PTR_ERR(irb)) {
case -EIO:
QDIO_PRINT_ERR("i/o error on device %s\n",
cdev->dev.bus_id);
return;
case -ETIMEDOUT:
qdio_timeout_handler(cdev);
return;
default:
QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
PTR_ERR(irb), cdev->dev.bus_id);
return;
}
}
qdio_irq_check_sense(irq_ptr->schid, irb);
#ifdef CONFIG_QDIO_DEBUG
sprintf(dbf_text, "state:%d", irq_ptr->state);
QDIO_DBF_TEXT4(0, trace, dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
cstat = irb->scsw.cstat;
dstat = irb->scsw.dstat;
switch (irq_ptr->state) {
case QDIO_IRQ_STATE_INACTIVE:
qdio_establish_handle_irq(cdev, cstat, dstat);
break;
case QDIO_IRQ_STATE_CLEANUP:
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
break;
case QDIO_IRQ_STATE_ESTABLISHED:
case QDIO_IRQ_STATE_ACTIVE:
if (cstat & SCHN_STAT_PCI) {
qdio_handle_pci(irq_ptr);
break;
}
if ((cstat&~SCHN_STAT_PCI)||dstat) {
qdio_handle_activate_check(cdev, intparm, cstat, dstat);
break;
}
default:
QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
"device %s?!\n",
irq_ptr->state, cdev->dev.bus_id);
}
wake_up(&cdev->private->wait_q);
}
int
qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
unsigned int queue_number)
{
int cc = 0;
struct qdio_q *q;
struct qdio_irq *irq_ptr;
void *ptr;
#ifdef CONFIG_QDIO_DEBUG
char dbf_text[15]="SyncXXXX";
#endif
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
#ifdef CONFIG_QDIO_DEBUG
*((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
*((int*)(&dbf_text[0]))=flags;
*((int*)(&dbf_text[4]))=queue_number;
QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
#endif /* CONFIG_QDIO_DEBUG */
if (flags&QDIO_FLAG_SYNC_INPUT) {
q=irq_ptr->input_qs[queue_number];
if (!q)
return -EINVAL;
if (!(irq_ptr->is_qebsm))
cc = do_siga_sync(q->schid, 0, q->mask);
} else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
q=irq_ptr->output_qs[queue_number];
if (!q)
return -EINVAL;
if (!(irq_ptr->is_qebsm))
cc = do_siga_sync(q->schid, q->mask, 0);
} else
return -EINVAL;
ptr=&cc;
if (cc)
QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
return cc;
}
static void
qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
unsigned long token)
{
struct qdio_q *q;
int i;
unsigned int count, start_buf;
char dbf_text[15];
/*check if QEBSM is disabled */
if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
irq_ptr->is_qebsm = 0;
irq_ptr->sch_token = 0;
irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
QDIO_DBF_TEXT0(0,setup,"noV=V");
return;
}
irq_ptr->sch_token = token;
/*input queue*/
for (i = 0; i < irq_ptr->no_input_qs;i++) {
q = irq_ptr->input_qs[i];
count = QDIO_MAX_BUFFERS_PER_Q;
start_buf = 0;
set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
}
sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
QDIO_DBF_TEXT0(0,setup,dbf_text);
/*output queue*/
for (i = 0; i < irq_ptr->no_output_qs; i++) {
q = irq_ptr->output_qs[i];
count = QDIO_MAX_BUFFERS_PER_Q;
start_buf = 0;
set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
}
}
static void
qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
{
int result;
unsigned char qdioac;
struct {
struct chsc_header request;
u16 reserved1:10;
u16 ssid:2;
u16 fmt:4;
u16 first_sch;
u16 reserved2;
u16 last_sch;
u32 reserved3;
struct chsc_header response;
u32 reserved4;
u8 flags;
u8 reserved5;
u16 sch;
u8 qfmt;
u8 parm;
u8 qdioac1;
u8 sch_class;
u8 reserved7;
u8 icnt;
u8 reserved8;
u8 ocnt;
u8 reserved9;
u8 mbccnt;
u16 qdioac2;
u64 sch_token;
} *ssqd_area;
QDIO_DBF_TEXT0(0,setup,"getssqd");
qdioac = 0;
ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
if (!ssqd_area) {
QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
"SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
irq_ptr->is_qebsm = 0;
irq_ptr->sch_token = 0;
irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
return;
}
ssqd_area->request = (struct chsc_header) {
.length = 0x0010,
.code = 0x0024,
};
ssqd_area->first_sch = irq_ptr->schid.sch_no;
ssqd_area->last_sch = irq_ptr->schid.sch_no;
ssqd_area->ssid = irq_ptr->schid.ssid;
result = chsc(ssqd_area);
if (result) {
QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
"SIGAs for sch 0.%x.%x.\n", result,
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
irq_ptr->is_qebsm = 0;
goto out;
}
if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon checking SIGA needs " \
"is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
ssqd_area->response.code,
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
irq_ptr->is_qebsm = 0;
goto out;
}
if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
!(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
(ssqd_area->sch != irq_ptr->schid.sch_no)) {
QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
"using all SIGAs.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
irq_ptr->is_qebsm = 0;
goto out;
}
qdioac = ssqd_area->qdioac1;
out:
qdio_check_subchannel_qebsm(irq_ptr, qdioac,
ssqd_area->sch_token);
mempool_free(ssqd_area, qdio_mempool_scssc);
irq_ptr->qdioac = qdioac;
}
static unsigned int
tiqdio_check_chsc_availability(void)
{
char dbf_text[15];
if (!css_characteristics_avail)
return -EIO;
/* Check for bit 41. */
if (!css_general_characteristics.aif) {
QDIO_PRINT_WARN("Adapter interruption facility not " \
"installed.\n");
return -ENOENT;
}
/* Check for bits 107 and 108. */
if (!css_chsc_characteristics.scssc ||
!css_chsc_characteristics.scsscf) {
QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
"not available.\n");
return -ENOENT;
}
/* Check for OSA/FCP thin interrupts (bit 67). */
hydra_thinints = css_general_characteristics.aif_osa;
sprintf(dbf_text,"hydrati%1x", hydra_thinints);
QDIO_DBF_TEXT0(0,setup,dbf_text);
#ifdef CONFIG_64BIT
/* Check for QEBSM support in general (bit 58). */
is_passthrough = css_general_characteristics.qebsm;
#endif
sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
QDIO_DBF_TEXT0(0,setup,dbf_text);
/* Check for aif time delay disablement fac (bit 56). If installed,
* omit svs even under lpar (good point by rick again) */
omit_svs = css_general_characteristics.aif_tdd;
sprintf(dbf_text,"omitsvs%1x", omit_svs);
QDIO_DBF_TEXT0(0,setup,dbf_text);
return 0;
}
static unsigned int
tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
{
unsigned long real_addr_local_summary_bit;
unsigned long real_addr_dev_st_chg_ind;
void *ptr;
char dbf_text[15];
unsigned int resp_code;
int result;
struct {
struct chsc_header request;
u16 operation_code;
u16 reserved1;
u32 reserved2;
u32 reserved3;
u64 summary_indicator_addr;
u64 subchannel_indicator_addr;
u32 ks:4;
u32 kc:4;
u32 reserved4:21;
u32 isc:3;
u32 word_with_d_bit;
/* set to 0x10000000 to enable
* time delay disablement facility */
u32 reserved5;
struct subchannel_id schid;
u32 reserved6[1004];
struct chsc_header response;
u32 reserved7;
} *scssc_area;
if (!irq_ptr->is_thinint_irq)
return -ENODEV;
if (reset_to_zero) {
real_addr_local_summary_bit=0;
real_addr_dev_st_chg_ind=0;
} else {
real_addr_local_summary_bit=
virt_to_phys((volatile void *)tiqdio_ind);
real_addr_dev_st_chg_ind=
virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
}
scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
if (!scssc_area) {
QDIO_PRINT_WARN("No memory for setting indicators on " \
"subchannel 0.%x.%x.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
return -ENOMEM;
}
scssc_area->request = (struct chsc_header) {
.length = 0x0fe0,
.code = 0x0021,
};
scssc_area->operation_code = 0;
scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
scssc_area->ks = QDIO_STORAGE_KEY;
scssc_area->kc = QDIO_STORAGE_KEY;
scssc_area->isc = TIQDIO_THININT_ISC;
scssc_area->schid = irq_ptr->schid;
/* enables the time delay disablement facility. Don't care
* whether it is really there (i.e. we haven't checked for
* it) */
if (css_general_characteristics.aif_tdd)
scssc_area->word_with_d_bit = 0x10000000;
else
QDIO_PRINT_WARN("Time delay disablement facility " \
"not available\n");
result = chsc(scssc_area);
if (result) {
QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
"cc=%i.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
result = -EIO;
goto out;
}
resp_code = scssc_area->response.code;
if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon setting indicators " \
"is 0x%x.\n",resp_code);
sprintf(dbf_text,"sidR%4x",resp_code);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT1(0,setup,dbf_text);
ptr=&scssc_area->response;
QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
result = -EIO;
goto out;
}
QDIO_DBF_TEXT2(0,setup,"setscind");
QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
sizeof(unsigned long));
QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
result = 0;
out:
mempool_free(scssc_area, qdio_mempool_scssc);
return result;
}
static unsigned int
tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
{
unsigned int resp_code;
int result;
void *ptr;
char dbf_text[15];
struct {
struct chsc_header request;
u16 operation_code;
u16 reserved1;
u32 reserved2;
u32 reserved3;
u32 reserved4[2];
u32 delay_target;
u32 reserved5[1009];
struct chsc_header response;
u32 reserved6;
} *scsscf_area;
if (!irq_ptr->is_thinint_irq)
return -ENODEV;
scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
if (!scsscf_area) {
QDIO_PRINT_WARN("No memory for setting delay target on " \
"subchannel 0.%x.%x.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
return -ENOMEM;
}
scsscf_area->request = (struct chsc_header) {
.length = 0x0fe0,
.code = 0x1027,
};
scsscf_area->delay_target = delay_target<<16;
result=chsc(scsscf_area);
if (result) {
QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
"cc=%i. Continuing.\n",
irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
result);
result = -EIO;
goto out;
}
resp_code = scsscf_area->response.code;
if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
QDIO_PRINT_WARN("response upon setting delay target " \
"is 0x%x. Continuing.\n",resp_code);
sprintf(dbf_text,"sdtR%4x",resp_code);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT1(0,setup,dbf_text);
ptr=&scsscf_area->response;
QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
}
QDIO_DBF_TEXT2(0,trace,"delytrgt");
QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
result = 0; /* not critical */
out:
mempool_free(scsscf_area, qdio_mempool_scssc);
return result;
}
int
qdio_cleanup(struct ccw_device *cdev, int how)
{
struct qdio_irq *irq_ptr;
char dbf_text[15];
int rc;
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT0(0,setup,dbf_text);
rc = qdio_shutdown(cdev, how);
if ((rc == 0) || (rc == -EINPROGRESS))
rc = qdio_free(cdev);
return rc;
}
int
qdio_shutdown(struct ccw_device *cdev, int how)
{
struct qdio_irq *irq_ptr;
int i;
int result = 0;
int rc;
unsigned long flags;
int timeout;
char dbf_text[15];
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
down(&irq_ptr->setting_up_sema);
sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT0(0,setup,dbf_text);
/* mark all qs as uninteresting */
for (i=0;i<irq_ptr->no_input_qs;i++)
atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
for (i=0;i<irq_ptr->no_output_qs;i++)
atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
tasklet_kill(&tiqdio_tasklet);
for (i=0;i<irq_ptr->no_input_qs;i++) {
qdio_unmark_q(irq_ptr->input_qs[i]);
tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
wait_event_interruptible_timeout(cdev->private->wait_q,
!atomic_read(&irq_ptr->
input_qs[i]->
use_count),
QDIO_NO_USE_COUNT_TIMEOUT);
if (atomic_read(&irq_ptr->input_qs[i]->use_count))
result=-EINPROGRESS;
}
for (i=0;i<irq_ptr->no_output_qs;i++) {
tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
del_timer(&irq_ptr->output_qs[i]->timer);
wait_event_interruptible_timeout(cdev->private->wait_q,
!atomic_read(&irq_ptr->
output_qs[i]->
use_count),
QDIO_NO_USE_COUNT_TIMEOUT);
if (atomic_read(&irq_ptr->output_qs[i]->use_count))
result=-EINPROGRESS;
}
/* cleanup subchannel */
spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
} else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
timeout=QDIO_CLEANUP_HALT_TIMEOUT;
} else { /* default behaviour */
rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
timeout=QDIO_CLEANUP_HALT_TIMEOUT;
}
if (rc == -ENODEV) {
/* No need to wait for device no longer present. */
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
} else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
/*
* Whoever put another handler there, has to cope with the
* interrupt theirself. Might happen if qdio_shutdown was
* called on already shutdown queues, but this shouldn't have
* bad side effects.
*/
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
} else if (rc == 0) {
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
ccw_device_set_timeout(cdev, timeout);
spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
wait_event(cdev->private->wait_q,
irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
irq_ptr->state == QDIO_IRQ_STATE_ERR);
} else {
QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
"device %s\n", result, cdev->dev.bus_id);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
result = rc;
goto out;
}
if (irq_ptr->is_thinint_irq) {
qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
tiqdio_set_subchannel_ind(irq_ptr,1);
/* reset adapter interrupt indicators */
}
/* exchange int handlers, if necessary */
if ((void*)cdev->handler == (void*)qdio_handler)
cdev->handler=irq_ptr->original_int_handler;
/* Ignore errors. */
qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
ccw_device_set_timeout(cdev, 0);
out:
up(&irq_ptr->setting_up_sema);
return result;
}
int
qdio_free(struct ccw_device *cdev)
{
struct qdio_irq *irq_ptr;
char dbf_text[15];
irq_ptr = cdev->private->qdio_data;
if (!irq_ptr)
return -ENODEV;
down(&irq_ptr->setting_up_sema);
sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
QDIO_DBF_TEXT1(0,trace,dbf_text);
QDIO_DBF_TEXT0(0,setup,dbf_text);
cdev->private->qdio_data = NULL;
up(&irq_ptr->setting_up_sema);
qdio_release_irq_memory(irq_ptr);
module_put(THIS_MODULE);
return 0;
}
static void
qdio_allocate_do_dbf(struct qdio_initialize *init_data)
{
char dbf_text[20]; /* if a printf printed out more than 8 chars */
sprintf(dbf_text,"qfmt:%x",init_data->q_format);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
QDIO_DBF_TEXT0(0,setup,dbf_text);
sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
QDIO_DBF_TEXT0(0,setup,dbf_text);
QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,