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Changed IRQ-handling to use spinlocks instead of cli/sti

This commit is contained in:
Ulrich Albrecht 2001-08-16 09:42:20 +00:00
parent 276d17903c
commit 89a11781cb
4 changed files with 33 additions and 58 deletions
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44
drivers/isdn/hysdn/boardergo.c
View File

@ -59,11 +59,10 @@ ergo_interrupt(int intno, void *dev_id, struct pt_regs *regs)
if (!card->irq_enabled)
return; /* other device interrupting or irq switched off */
save_flags(flags);
cli(); /* no further irqs allowed */
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
if (!(bytein(card->iobase + PCI9050_INTR_REG) & PCI9050_INTR_REG_STAT1)) {
restore_flags(flags); /* restore old state */
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
return; /* no interrupt requested by E1 */
}
/* clear any pending ints on the board */
@ -77,7 +76,7 @@ ergo_interrupt(int intno, void *dev_id, struct pt_regs *regs)
queue_task(&card->irq_queue, &tq_immediate);
mark_bh(IMMEDIATE_BH);
}
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
} /* ergo_interrupt */
/******************************************************************************/
@ -97,17 +96,15 @@ ergo_irq_bh(hysdn_card * card)
return; /* invalid call */
dpr = card->dpram; /* point to DPRAM */
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
save_flags(flags);
cli();
if (card->hw_lock) {
restore_flags(flags); /* hardware currently unavailable */
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
return;
}
card->hw_lock = 1; /* we now lock the hardware */
do {
sti(); /* reenable other ints */
again = 0; /* assume loop not to be repeated */
if (!dpr->ToHyFlag) {
@ -127,15 +124,13 @@ ergo_irq_bh(hysdn_card * card)
again = 1; /* restart loop */
}
} /* a message has arrived for us */
cli(); /* no further ints */
if (again) {
dpr->ToHyInt = 1;
dpr->ToPcInt = 1; /* interrupt to E1 for all cards */
} else
card->hw_lock = 0; /* free hardware again */
} while (again); /* until nothing more to do */
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
} /* ergo_irq_bh */
@ -152,8 +147,7 @@ ergo_stopcard(hysdn_card * card)
#ifdef CONFIG_HYSDN_CAPI
hycapi_capi_stop(card);
#endif /* CONFIG_HYSDN_CAPI */
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
val = bytein(card->iobase + PCI9050_INTR_REG); /* get actual value */
val &= ~(PCI9050_INTR_REG_ENPCI | PCI9050_INTR_REG_EN1); /* mask irq */
byteout(card->iobase + PCI9050_INTR_REG, val);
@ -161,8 +155,7 @@ ergo_stopcard(hysdn_card * card)
byteout(card->iobase + PCI9050_USER_IO, PCI9050_E1_RESET); /* reset E1 processor */
card->state = CARD_STATE_UNUSED;
card->err_log_state = ERRLOG_STATE_OFF; /* currently no log active */
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
} /* ergo_stopcard */
/**************************************************************************/
@ -177,20 +170,17 @@ ergo_set_errlog_state(hysdn_card * card, int on)
card->err_log_state = ERRLOG_STATE_OFF; /* must be off */
return;
}
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
if (((card->err_log_state == ERRLOG_STATE_OFF) && !on) ||
((card->err_log_state == ERRLOG_STATE_ON) && on)) {
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
return; /* nothing to do */
}
if (on)
card->err_log_state = ERRLOG_STATE_START; /* request start */
else
card->err_log_state = ERRLOG_STATE_STOP; /* request stop */
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
queue_task(&card->irq_queue, &tq_immediate);
mark_bh(IMMEDIATE_BH);
} /* ergo_set_errlog_state */
@ -259,9 +249,6 @@ ergo_writebootimg(struct HYSDN_CARD *card, uchar * buf, ulong offs)
while (!dpram->ToHyNoDpramErrLog); /* reread volatile register to flush PCI */
byteout(card->iobase + PCI9050_USER_IO, PCI9050_E1_RUN); /* start E1 processor */
/* the interrupts are still masked */
sti();
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout((20 * HZ) / 1000); /* Timeout 20ms */
@ -296,7 +283,6 @@ ergo_writebootseq(struct HYSDN_CARD *card, uchar * buf, int len)
dst = sp->Data; /* point to data in spool structure */
buflen = sp->Len; /* maximum len of spooled data */
wr_mirror = sp->WrPtr; /* only once read */
sti();
/* try until all bytes written or error */
i = 0x1000; /* timeout value */
@ -372,9 +358,7 @@ ergo_waitpofready(struct HYSDN_CARD *card)
if (card->debug_flags & LOG_POF_RECORD)
hysdn_addlog(card, "ERGO: pof boot success");
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
card->state = CARD_STATE_RUN; /* now card is running */
/* enable the cards interrupt */
byteout(card->iobase + PCI9050_INTR_REG,
@ -385,8 +369,7 @@ ergo_waitpofready(struct HYSDN_CARD *card)
dpr->ToPcFlag = 0; /* reset data indicator */
dpr->ToHyInt = 1;
dpr->ToPcInt = 1; /* interrupt to E1 for all cards */
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
if ((hynet_enable & (1 << card->myid))
&& (i = hysdn_net_create(card)))
{
@ -401,7 +384,6 @@ ergo_waitpofready(struct HYSDN_CARD *card)
#endif /* CONFIG_HYSDN_CAPI */
return (0); /* success */
} /* data has arrived */
sti();
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout((50 * HZ) / 1000); /* Timeout 50ms */
} /* wait until timeout */

4
drivers/isdn/hysdn/hysdn_defs.h
View File

@ -30,6 +30,10 @@
#include <linux/tqueue.h>
#include <linux/skbuff.h>
#include <linux/isdn_compat.h>
#include <linux/spinlock.h>
#define HYSDN_SPIN_LOCK(a,b) spin_lock(a)
#define HYSDN_SPIN_UNLOCK(a,b) spin_unlock(a)
/****************************/
/* storage type definitions */

15
drivers/isdn/hysdn/hysdn_proclog.c
View File

@ -128,8 +128,7 @@ put_log_buffer(hysdn_card * card, char *cp)
strcpy(ib->log_start, cp); /* set output string */
ib->next = NULL;
ib->proc_ctrl = pd; /* point to own control structure */
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
ib->usage_cnt = pd->if_used;
if (!pd->log_head)
pd->log_head = ib; /* new head */
@ -137,7 +136,7 @@ put_log_buffer(hysdn_card * card, char *cp)
pd->log_tail->next = ib; /* follows existing messages */
pd->log_tail = ib; /* new tail */
i = pd->del_lock++; /* get lock state */
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
/* delete old entrys */
if (!i)
@ -294,14 +293,13 @@ hysdn_log_open(struct inode *ino, struct file *filep)
} else if ((filep->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ) {
/* read access -> log/debug read */
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
pd->if_used++;
if (pd->log_head)
(struct log_data **) filep->private_data = &(pd->log_tail->next);
else
(struct log_data **) filep->private_data = &(pd->log_head);
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
} else { /* simultaneous read/write access forbidden ! */
#ifdef COMPAT_USE_MODCOUNT_LOCK
MOD_DEC_USE_COUNT;
@ -342,8 +340,7 @@ hysdn_log_close(struct inode *ino, struct file *filep)
/* read access -> log/debug read, mark one further file as closed */
pd = NULL;
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
inf = *((struct log_data **) filep->private_data); /* get first log entry */
if (inf)
pd = (struct procdata *) inf->proc_ctrl; /* still entries there */
@ -366,7 +363,7 @@ hysdn_log_close(struct inode *ino, struct file *filep)
inf->usage_cnt--; /* decrement usage count for buffers */
inf = inf->next;
}
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
if (pd)
if (pd->if_used <= 0) /* delete buffers if last file closed */

28
drivers/isdn/hysdn/hysdn_sched.c
View File

@ -164,22 +164,19 @@ hysdn_tx_cfgline(hysdn_card * card, uchar * line, word chan)
if (card->debug_flags & LOG_SCHED_ASYN)
hysdn_addlog(card, "async tx-cfg chan=%d len=%d", chan, strlen(line) + 1);
save_flags(flags);
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
while (card->async_busy) {
sti();
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
if (card->debug_flags & LOG_SCHED_ASYN)
hysdn_addlog(card, "async tx-cfg delayed");
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout((20 * HZ) / 1000); /* Timeout 20ms */
if (!--cnt) {
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
return (-ERR_ASYNC_TIME); /* timed out */
}
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
} /* wait for buffer to become free */
strcpy(card->async_data, line);
@ -190,31 +187,26 @@ hysdn_tx_cfgline(hysdn_card * card, uchar * line, word chan)
/* now queue the task */
queue_task(&card->irq_queue, &tq_immediate);
mark_bh(IMMEDIATE_BH);
sti();
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
if (card->debug_flags & LOG_SCHED_ASYN)
hysdn_addlog(card, "async tx-cfg data queued");
cnt++; /* short delay */
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
while (card->async_busy) {
sti();
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
if (card->debug_flags & LOG_SCHED_ASYN)
hysdn_addlog(card, "async tx-cfg waiting for tx-ready");
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout((20 * HZ) / 1000); /* Timeout 20ms */
if (!--cnt) {
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
return (-ERR_ASYNC_TIME); /* timed out */
}
cli();
HYSDN_SPIN_LOCK(&card->irq_lock, flags);
} /* wait for buffer to become free again */
restore_flags(flags);
HYSDN_SPIN_UNLOCK(&card->irq_lock, flags);
if (card->debug_flags & LOG_SCHED_ASYN)
hysdn_addlog(card, "async tx-cfg data send");