a8237fc410
This patch introduces a struct subchannel_id containing the subchannel number (formerly referred to as "irq") and switches code formerly relying on the subchannel number over to it. While we're touching inline assemblies anyway, make sure they have correct memory constraints. Signed-off-by: Cornelia Huck <cohuck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
147 lines
4.9 KiB
C
147 lines
4.9 KiB
C
#ifndef S390_CIO_H
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#define S390_CIO_H
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#include "schid.h"
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/*
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* where we put the ssd info
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*/
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struct ssd_info {
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__u8 valid:1;
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__u8 type:7; /* subchannel type */
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__u8 chpid[8]; /* chpids */
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__u16 fla[8]; /* full link addresses */
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} __attribute__ ((packed));
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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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/*
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* operation request block
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*/
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struct orb {
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__u32 intparm; /* interruption parameter */
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__u32 key : 4; /* flags, like key, suspend control, etc. */
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__u32 spnd : 1; /* suspend control */
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__u32 res1 : 1; /* reserved */
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__u32 mod : 1; /* modification control */
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__u32 sync : 1; /* synchronize control */
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__u32 fmt : 1; /* format control */
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__u32 pfch : 1; /* prefetch control */
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__u32 isic : 1; /* initial-status-interruption control */
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__u32 alcc : 1; /* address-limit-checking control */
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__u32 ssic : 1; /* suppress-suspended-interr. control */
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__u32 res2 : 1; /* reserved */
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__u32 c64 : 1; /* IDAW/QDIO 64 bit control */
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__u32 i2k : 1; /* IDAW 2/4kB block size control */
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__u32 lpm : 8; /* logical path mask */
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__u32 ils : 1; /* incorrect length */
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__u32 zero : 6; /* reserved zeros */
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__u32 orbx : 1; /* ORB extension control */
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__u32 cpa; /* channel program address */
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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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enum {
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SUBCHANNEL_TYPE_IO = 0,
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SUBCHANNEL_TYPE_CHSC = 1,
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SUBCHANNEL_TYPE_MESSAGE = 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 orb orb; /* operation request block */
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struct ccw1 sense_ccw; /* static ccw for sense command */
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struct 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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} __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);
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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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/* 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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#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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#endif
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extern int cio_show_msg;
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#endif
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