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