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[S390] cio: Channel-path configure function.

Browse source 
Add a new attribute to the channel-path sysfs directory through which
channel-path configure operations can be triggered. Also listen for
hardware events requesting channel-path configure operations and
process them accordingly.

Signed-off-by: Peter Oberparleiter <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
This commit is contained in:
Peter Oberparleiter 2007-04-27 16:01:31 +02:00 • committed by Martin Schwidefsky
commit e5854a5839
15 changed files with 534 additions and 15 deletions
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53
include/asm-s390/chpid.h Normal file
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@ -0,0 +1,53 @@
/*
* drivers/s390/cio/chpid.h
*
* Copyright IBM Corp. 2007
* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
*/
#ifndef _ASM_S390_CHPID_H
#define _ASM_S390_CHPID_H _ASM_S390_CHPID_H
#include <linux/string.h>
#include <asm/types.h>
#include <asm/cio.h>
#define __MAX_CHPID 255
struct chp_id {
u8 reserved1;
u8 cssid;
u8 reserved2;
u8 id;
} __attribute__((packed));
static inline void chp_id_init(struct chp_id *chpid)
{
memset(chpid, 0, sizeof(struct chp_id));
}
static inline int chp_id_is_equal(struct chp_id *a, struct chp_id *b)
{
return (a->id == b->id) && (a->cssid == b->cssid);
}
static inline void chp_id_next(struct chp_id *chpid)
{
if (chpid->id < __MAX_CHPID)
chpid->id++;
else {
chpid->id = 0;
chpid->cssid++;
}
}
static inline int chp_id_is_valid(struct chp_id *chpid)
{
return (chpid->cssid <= __MAX_CSSID);
}
#define chp_id_for_each(c) \
for (chp_id_init(c); chp_id_is_valid(c); chp_id_next(c))
#endif /* _ASM_S390_CHPID_H */

1
include/asm-s390/cio.h
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@ -13,6 +13,7 @@
#ifdef __KERNEL__
#define LPM_ANYPATH 0xff
#define __MAX_CSSID 0
/*
* subchannel status word

12
include/asm-s390/sclp.h
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@ -9,6 +9,7 @@
#define _ASM_S390_SCLP_H
#include <linux/types.h>
#include <asm/chpid.h>
struct sccb_header {
u16 length;
@ -33,7 +34,18 @@ struct sclp_readinfo_sccb {
u8 _reserved3[4096 - 112]; /* 112-4095 */
} __attribute__((packed, aligned(4096)));
#define SCLP_CHP_INFO_MASK_SIZE 32
struct sclp_chp_info {
u8 recognized[SCLP_CHP_INFO_MASK_SIZE];
u8 standby[SCLP_CHP_INFO_MASK_SIZE];
u8 configured[SCLP_CHP_INFO_MASK_SIZE];
};
extern struct sclp_readinfo_sccb s390_readinfo_sccb;
extern void sclp_readinfo_early(void);
extern int sclp_chp_configure(struct chp_id chpid);
extern int sclp_chp_deconfigure(struct chp_id chpid);
extern int sclp_chp_read_info(struct sclp_chp_info *info);
#endif /* _ASM_S390_SCLP_H */