From: Cornelia Huck <[email protected]>
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 <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
---
drivers/s390/cio/cio.c | 13 +++++++------
drivers/s390/cio/css.c | 4 +++-
drivers/s390/cio/device.c | 3 ++-
drivers/s390/cio/qdio.h | 3 ++-
include/asm-s390/isc.h | 18 ++++++++++++++++++
5 files changed, 32 insertions(+), 9 deletions(-)
Index: quilt-2.6/drivers/s390/cio/cio.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/cio.c
+++ quilt-2.6/drivers/s390/cio/cio.c
@@ -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;
}
Index: quilt-2.6/drivers/s390/cio/css.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/css.c
+++ quilt-2.6/drivers/s390/cio/css.c
@@ -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;
Index: quilt-2.6/drivers/s390/cio/device.c
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/device.c
+++ quilt-2.6/drivers/s390/cio/device.c
@@ -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(st
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",
Index: quilt-2.6/drivers/s390/cio/qdio.h
===================================================================
--- quilt-2.6.orig/drivers/s390/cio/qdio.h
+++ quilt-2.6/drivers/s390/cio/qdio.h
@@ -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 */
Index: quilt-2.6/include/asm-s390/isc.h
===================================================================
--- /dev/null
+++ quilt-2.6/include/asm-s390/isc.h
@@ -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 */
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.