a806170e29
Most noteable part of this commit is the new local header file entry.h which contains all the function declarations of functions that get only called from asm code or are arch internal. That way we can avoid extern declarations in C files. This is more or less the same that was done for sparc64. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
122 lines
4.1 KiB
C
122 lines
4.1 KiB
C
#ifndef S390_CIO_H
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#define S390_CIO_H
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <asm/chpid.h>
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#include "chsc.h"
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#include "schid.h"
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/*
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* path management control word
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*/
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struct pmcw {
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u32 intparm; /* interruption parameter */
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u32 qf : 1; /* qdio facility */
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u32 res0 : 1; /* reserved zeros */
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u32 isc : 3; /* interruption sublass */
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u32 res5 : 3; /* reserved zeros */
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u32 ena : 1; /* enabled */
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u32 lm : 2; /* limit mode */
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u32 mme : 2; /* measurement-mode enable */
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u32 mp : 1; /* multipath mode */
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u32 tf : 1; /* timing facility */
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u32 dnv : 1; /* device number valid */
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u32 dev : 16; /* device number */
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u8 lpm; /* logical path mask */
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u8 pnom; /* path not operational mask */
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u8 lpum; /* last path used mask */
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u8 pim; /* path installed mask */
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u16 mbi; /* measurement-block index */
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u8 pom; /* path operational mask */
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u8 pam; /* path available mask */
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u8 chpid[8]; /* CHPID 0-7 (if available) */
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u32 unused1 : 8; /* reserved zeros */
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u32 st : 3; /* subchannel type */
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u32 unused2 : 18; /* reserved zeros */
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u32 mbfc : 1; /* measurement block format control */
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u32 xmwme : 1; /* extended measurement word mode enable */
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u32 csense : 1; /* concurrent sense; can be enabled ...*/
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/* ... per MSCH, however, if facility */
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/* ... is not installed, this results */
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/* ... in an operand exception. */
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} __attribute__ ((packed));
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/*
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* subchannel information block
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*/
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struct schib {
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struct pmcw pmcw; /* path management control word */
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struct scsw scsw; /* subchannel status word */
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__u64 mba; /* measurement block address */
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__u8 mda[4]; /* model dependent area */
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} __attribute__ ((packed,aligned(4)));
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/* subchannel data structure used by I/O subroutines */
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struct subchannel {
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struct subchannel_id schid;
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spinlock_t *lock; /* subchannel lock */
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struct mutex reg_mutex;
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enum {
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SUBCHANNEL_TYPE_IO = 0,
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SUBCHANNEL_TYPE_CHSC = 1,
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SUBCHANNEL_TYPE_MSG = 2,
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SUBCHANNEL_TYPE_ADM = 3,
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} st; /* subchannel type */
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struct {
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unsigned int suspend:1; /* allow suspend */
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unsigned int prefetch:1;/* deny prefetch */
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unsigned int inter:1; /* suppress intermediate interrupts */
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} __attribute__ ((packed)) options;
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__u8 vpm; /* verified path mask */
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__u8 lpm; /* logical path mask */
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__u8 opm; /* operational path mask */
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struct schib schib; /* subchannel information block */
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struct chsc_ssd_info ssd_info; /* subchannel description */
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struct device dev; /* entry in device tree */
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struct css_driver *driver;
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void *private; /* private per subchannel type data */
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} __attribute__ ((aligned(8)));
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#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
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#define to_subchannel(n) container_of(n, struct subchannel, dev)
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extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
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extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32);
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extern int cio_disable_subchannel (struct subchannel *);
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extern int cio_cancel (struct subchannel *);
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extern int cio_clear (struct subchannel *);
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extern int cio_resume (struct subchannel *);
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extern int cio_halt (struct subchannel *);
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extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
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extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
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extern int cio_cancel (struct subchannel *);
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extern int cio_set_options (struct subchannel *, int);
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extern int cio_get_options (struct subchannel *);
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extern int cio_modify (struct subchannel *);
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int cio_create_sch_lock(struct subchannel *);
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void do_adapter_IO(void);
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void do_IRQ(struct pt_regs *);
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/* Use with care. */
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#ifdef CONFIG_CCW_CONSOLE
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extern struct subchannel *cio_probe_console(void);
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extern void cio_release_console(void);
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extern int cio_is_console(struct subchannel_id);
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extern struct subchannel *cio_get_console_subchannel(void);
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extern spinlock_t * cio_get_console_lock(void);
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extern void *cio_get_console_priv(void);
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#else
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#define cio_is_console(schid) 0
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#define cio_get_console_subchannel() NULL
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#define cio_get_console_lock() NULL
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#define cio_get_console_priv() NULL
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#endif
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extern int cio_show_msg;
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#endif
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