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[S390] cio: Introduce abstract isc definitions.

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Replace the numeric values for I/O interruption subclass usage
with abstract definitions and collect them all in asm/isc.h.
This gives us a better overview of which iscs are actually used
and makes it possible to better spread out isc usage in the
future.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Cornelia Huck 2008-07-14 09:58:58 +02:00 committed by Heiko Carstens
parent 75784c0087
commit 3a3fc29a6d
5 changed files with 32 additions and 9 deletions
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13
drivers/s390/cio/cio.c
View File

@ -24,6 +24,7 @@
#include <asm/ipl.h>
#include <asm/chpid.h>
#include <asm/airq.h>
#include <asm/isc.h>
#include <asm/cpu.h>
#include <asm/fcx.h>
#include "cio.h"
@ -699,9 +700,9 @@ void wait_cons_dev(void)
if (!console_subchannel_in_use)
return;
/* disable all but isc 1 (console device) */
/* disable all but the console isc */
__ctl_store (save_cr6, 6, 6);
cr6 = 0x40000000;
cr6 = 1UL << (31 - CONSOLE_ISC);
__ctl_load (cr6, 6, 6);
do {
@ -783,10 +784,10 @@ cio_probe_console(void)
}
/*
* enable console I/O-interrupt subclass 1
* enable console I/O-interrupt subclass
*/
ctl_set_bit(6, 30);
console_subchannel.schib.pmcw.isc = 1;
ctl_set_bit(6, 31 - CONSOLE_ISC);
console_subchannel.schib.pmcw.isc = CONSOLE_ISC;
console_subchannel.schib.pmcw.intparm =
(u32)(addr_t)&console_subchannel;
ret = cio_modify(&console_subchannel);
@ -802,7 +803,7 @@ cio_release_console(void)
{
console_subchannel.schib.pmcw.intparm = 0;
cio_modify(&console_subchannel);
ctl_clear_bit(6, 30);
ctl_clear_bit(6, 31 - CONSOLE_ISC);
console_subchannel_in_use = 0;
}

4
drivers/s390/cio/css.c
View File

@ -13,6 +13,7 @@
#include <linux/errno.h>
#include <linux/list.h>
#include <linux/reboot.h>
#include <asm/isc.h>
#include "../s390mach.h"
#include "css.h"
@ -804,7 +805,8 @@ init_channel_subsystem (void)
goto out_pseudo;
css_init_done = 1;
ctl_set_bit(6, 28);
/* Enable default isc for I/O subchannels. */
ctl_set_bit(6, 31 - IO_SCH_ISC);
for_each_subchannel(__init_channel_subsystem, NULL);
return 0;

3
drivers/s390/cio/device.c
View File

@ -22,6 +22,7 @@
#include <asm/cio.h>
#include <asm/param.h> /* HZ */
#include <asm/cmb.h>
#include <asm/isc.h>
#include "chp.h"
#include "cio.h"
@ -1121,7 +1122,7 @@ static void io_subchannel_init_fields(struct subchannel *sch)
else
sch->opm = chp_get_sch_opm(sch);
sch->lpm = sch->schib.pmcw.pam & sch->opm;
sch->isc = cio_is_console(sch->schid) ? 1 : 3;
sch->isc = cio_is_console(sch->schid) ? CONSOLE_ISC : IO_SCH_ISC;
CIO_MSG_EVENT(6, "Detected device %04x on subchannel 0.%x.%04X"
" - PIM = %02X, PAM = %02X, POM = %02X\n",

3
drivers/s390/cio/qdio.h
View File

@ -2,6 +2,7 @@
#define _CIO_QDIO_H
#include <asm/page.h>
#include <asm/isc.h>
#include "schid.h"
@ -26,7 +27,7 @@
*/
#define IQDIO_FILL_LEVEL_TO_POLL 4
#define TIQDIO_THININT_ISC 3
#define TIQDIO_THININT_ISC QDIO_AIRQ_ISC
#define TIQDIO_DELAY_TARGET 0
#define QDIO_BUSY_BIT_PATIENCE 100 /* in microsecs */
#define QDIO_BUSY_BIT_GIVE_UP 10000000 /* 10 seconds */

18
include/asm-s390/isc.h Normal file
View File

@ -0,0 +1,18 @@
#ifndef _ASM_S390_ISC_H
#define _ASM_S390_ISC_H
/*
* I/O interruption subclasses used by drivers.
* Please add all used iscs here so that it is possible to distribute
* isc usage between drivers.
* Reminder: 0 is highest priority, 7 lowest.
*/
#define MAX_ISC 7
/* Regular I/O interrupts. */
#define IO_SCH_ISC 3 /* regular I/O subchannels */
#define CONSOLE_ISC 1 /* console I/O subchannel */
/* Adapter interrupts. */
#define QDIO_AIRQ_ISC IO_SCH_ISC /* I/O subchannel in qdio mode */
#endif /* _ASM_S390_ISC_H */