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linux/include/asm-s390/cio.h
Cornelia Huck ce26a8532f [S390] cio: Make ccw_dev_id_is_equal() more robust. 
Using memcmp to compare ccw_dev_id implies that the whole structure (incl.
padding) has always been completely initialized to sane values. Comparing
the structures field by field doesn't make such assumptions.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2006-12-04 15:40:54 +01:00

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/*
* include/asm-s390/cio.h
* include/asm-s390x/cio.h
*
* Common interface for I/O on S/390
*/
#ifndef _ASM_S390_CIO_H_
#define _ASM_S390_CIO_H_
#include <linux/spinlock.h>
#include <asm/types.h>
#ifdef __KERNEL__
#define LPM_ANYPATH 0xff
/*
* subchannel status word
*/
struct scsw {
__u32 key : 4; /* subchannel key */
__u32 sctl : 1; /* suspend control */
__u32 eswf : 1; /* ESW format */
__u32 cc : 2; /* deferred condition code */
__u32 fmt : 1; /* format */
__u32 pfch : 1; /* prefetch */
__u32 isic : 1; /* initial-status interruption control */
__u32 alcc : 1; /* address-limit checking control */
__u32 ssi : 1; /* supress-suspended interruption */
__u32 zcc : 1; /* zero condition code */
__u32 ectl : 1; /* extended control */
__u32 pno : 1; /* path not operational */
__u32 res : 1; /* reserved */
__u32 fctl : 3; /* function control */
__u32 actl : 7; /* activity control */
__u32 stctl : 5; /* status control */
__u32 cpa; /* channel program address */
__u32 dstat : 8; /* device status */
__u32 cstat : 8; /* subchannel status */
__u32 count : 16; /* residual count */
} __attribute__ ((packed));
#define SCSW_FCTL_CLEAR_FUNC 0x1
#define SCSW_FCTL_HALT_FUNC 0x2
#define SCSW_FCTL_START_FUNC 0x4
#define SCSW_ACTL_SUSPENDED 0x1
#define SCSW_ACTL_DEVACT 0x2
#define SCSW_ACTL_SCHACT 0x4
#define SCSW_ACTL_CLEAR_PEND 0x8
#define SCSW_ACTL_HALT_PEND 0x10
#define SCSW_ACTL_START_PEND 0x20
#define SCSW_ACTL_RESUME_PEND 0x40
#define SCSW_STCTL_STATUS_PEND 0x1
#define SCSW_STCTL_SEC_STATUS 0x2
#define SCSW_STCTL_PRIM_STATUS 0x4
#define SCSW_STCTL_INTER_STATUS 0x8
#define SCSW_STCTL_ALERT_STATUS 0x10
#define DEV_STAT_ATTENTION 0x80
#define DEV_STAT_STAT_MOD 0x40
#define DEV_STAT_CU_END 0x20
#define DEV_STAT_BUSY 0x10
#define DEV_STAT_CHN_END 0x08
#define DEV_STAT_DEV_END 0x04
#define DEV_STAT_UNIT_CHECK 0x02
#define DEV_STAT_UNIT_EXCEP 0x01
#define SCHN_STAT_PCI 0x80
#define SCHN_STAT_INCORR_LEN 0x40
#define SCHN_STAT_PROG_CHECK 0x20
#define SCHN_STAT_PROT_CHECK 0x10
#define SCHN_STAT_CHN_DATA_CHK 0x08
#define SCHN_STAT_CHN_CTRL_CHK 0x04
#define SCHN_STAT_INTF_CTRL_CHK 0x02
#define SCHN_STAT_CHAIN_CHECK 0x01
/*
* architectured values for first sense byte
*/
#define SNS0_CMD_REJECT 0x80
#define SNS_CMD_REJECT SNS0_CMD_REJEC
#define SNS0_INTERVENTION_REQ 0x40
#define SNS0_BUS_OUT_CHECK 0x20
#define SNS0_EQUIPMENT_CHECK 0x10
#define SNS0_DATA_CHECK 0x08
#define SNS0_OVERRUN 0x04
#define SNS0_INCOMPL_DOMAIN 0x01
/*
* architectured values for second sense byte
*/
#define SNS1_PERM_ERR 0x80
#define SNS1_INV_TRACK_FORMAT 0x40
#define SNS1_EOC 0x20
#define SNS1_MESSAGE_TO_OPER 0x10
#define SNS1_NO_REC_FOUND 0x08
#define SNS1_FILE_PROTECTED 0x04
#define SNS1_WRITE_INHIBITED 0x02
#define SNS1_INPRECISE_END 0x01
/*
* architectured values for third sense byte
*/
#define SNS2_REQ_INH_WRITE 0x80
#define SNS2_CORRECTABLE 0x40
#define SNS2_FIRST_LOG_ERR 0x20
#define SNS2_ENV_DATA_PRESENT 0x10
#define SNS2_INPRECISE_END 0x04
struct ccw1 {
__u8 cmd_code; /* command code */
__u8 flags; /* flags, like IDA addressing, etc. */
__u16 count; /* byte count */
__u32 cda; /* data address */
} __attribute__ ((packed,aligned(8)));
#define CCW_FLAG_DC 0x80
#define CCW_FLAG_CC 0x40
#define CCW_FLAG_SLI 0x20
#define CCW_FLAG_SKIP 0x10
#define CCW_FLAG_PCI 0x08
#define CCW_FLAG_IDA 0x04
#define CCW_FLAG_SUSPEND 0x02
#define CCW_CMD_READ_IPL 0x02
#define CCW_CMD_NOOP 0x03
#define CCW_CMD_BASIC_SENSE 0x04
#define CCW_CMD_TIC 0x08
#define CCW_CMD_STLCK 0x14
#define CCW_CMD_SENSE_PGID 0x34
#define CCW_CMD_SUSPEND_RECONN 0x5B
#define CCW_CMD_RDC 0x64
#define CCW_CMD_RELEASE 0x94
#define CCW_CMD_SET_PGID 0xAF
#define CCW_CMD_SENSE_ID 0xE4
#define CCW_CMD_DCTL 0xF3
#define SENSE_MAX_COUNT 0x20
struct erw {
__u32 res0 : 3; /* reserved */
__u32 auth : 1; /* Authorization check */
__u32 pvrf : 1; /* path-verification-required flag */
__u32 cpt : 1; /* channel-path timeout */
__u32 fsavf : 1; /* Failing storage address validity flag */
__u32 cons : 1; /* concurrent-sense */
__u32 scavf : 1; /* Secondary ccw address validity flag */
__u32 fsaf : 1; /* Failing storage address format */
__u32 scnt : 6; /* sense count if cons == 1 */
__u32 res16 : 16; /* reserved */
} __attribute__ ((packed));
/*
* subchannel logout area
*/
struct sublog {
__u32 res0 : 1; /* reserved */
__u32 esf : 7; /* extended status flags */
__u32 lpum : 8; /* last path used mask */
__u32 arep : 1; /* ancillary report */
__u32 fvf : 5; /* field-validity flags */
__u32 sacc : 2; /* storage access code */
__u32 termc : 2; /* termination code */
__u32 devsc : 1; /* device-status check */
__u32 serr : 1; /* secondary error */
__u32 ioerr : 1; /* i/o-error alert */
__u32 seqc : 3; /* sequence code */
} __attribute__ ((packed));
/*
* Format 0 Extended Status Word (ESW)
*/
struct esw0 {
struct sublog sublog; /* subchannel logout */
struct erw erw; /* extended report word */
__u32 faddr[2]; /* failing storage address */
__u32 saddr; /* secondary ccw address */
} __attribute__ ((packed));
/*
* Format 1 Extended Status Word (ESW)
*/
struct esw1 {
__u8 zero0; /* reserved zeros */
__u8 lpum; /* last path used mask */
__u16 zero16; /* reserved zeros */
struct erw erw; /* extended report word */
__u32 zeros[3]; /* 2 fullwords of zeros */
} __attribute__ ((packed));
/*
* Format 2 Extended Status Word (ESW)
*/
struct esw2 {
__u8 zero0; /* reserved zeros */
__u8 lpum; /* last path used mask */
__u16 dcti; /* device-connect-time interval */
struct erw erw; /* extended report word */
__u32 zeros[3]; /* 2 fullwords of zeros */
} __attribute__ ((packed));
/*
* Format 3 Extended Status Word (ESW)
*/
struct esw3 {
__u8 zero0; /* reserved zeros */
__u8 lpum; /* last path used mask */
__u16 res; /* reserved */
struct erw erw; /* extended report word */
__u32 zeros[3]; /* 2 fullwords of zeros */
} __attribute__ ((packed));
/*
* interruption response block
*/
struct irb {
struct scsw scsw; /* subchannel status word */
union { /* extended status word, 4 formats */
struct esw0 esw0;
struct esw1 esw1;
struct esw2 esw2;
struct esw3 esw3;
} esw;
__u8 ecw[32]; /* extended control word */
} __attribute__ ((packed,aligned(4)));
/*
* command information word (CIW) layout
*/
struct ciw {
__u32 et : 2; /* entry type */
__u32 reserved : 2; /* reserved */
__u32 ct : 4; /* command type */
__u32 cmd : 8; /* command */
__u32 count : 16; /* coun */
} __attribute__ ((packed));
#define CIW_TYPE_RCD 0x0 /* read configuration data */
#define CIW_TYPE_SII 0x1 /* set interface identifier */
#define CIW_TYPE_RNI 0x2 /* read node identifier */
/*
* Flags used as input parameters for do_IO()
*/
#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
/* ... for suspended CCWs */
/* Device or subchannel gone. */
#define CIO_GONE 0x0001
/* No path to device. */
#define CIO_NO_PATH 0x0002
/* Device has appeared. */
#define CIO_OPER 0x0004
/* Sick revalidation of device. */
#define CIO_REVALIDATE 0x0008
struct diag210 {
__u16 vrdcdvno : 16; /* device number (input) */
__u16 vrdclen : 16; /* data block length (input) */
__u32 vrdcvcla : 8; /* virtual device class (output) */
__u32 vrdcvtyp : 8; /* virtual device type (output) */
__u32 vrdcvsta : 8; /* virtual device status (output) */
__u32 vrdcvfla : 8; /* virtual device flags (output) */
__u32 vrdcrccl : 8; /* real device class (output) */
__u32 vrdccrty : 8; /* real device type (output) */
__u32 vrdccrmd : 8; /* real device model (output) */
__u32 vrdccrft : 8; /* real device feature (output) */
} __attribute__ ((packed,aligned(4)));
struct ccw_dev_id {
u8 ssid;
u16 devno;
};
static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
struct ccw_dev_id *dev_id2)
{
if ((dev_id1->ssid == dev_id2->ssid) &&
(dev_id1->devno == dev_id2->devno))
return 1;
return 0;
}
extern int diag210(struct diag210 *addr);
extern void wait_cons_dev(void);
extern void css_schedule_reprobe(void);
extern void reipl_ccw_dev(struct ccw_dev_id *id);
#endif
#endif
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