515 lines
13 KiB
C
515 lines
13 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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* struct cmd_scsw - command-mode subchannel status word
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* @key: subchannel key
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* @sctl: suspend control
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* @eswf: esw format
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* @cc: deferred condition code
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* @fmt: format
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* @pfch: prefetch
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* @isic: initial-status interruption control
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* @alcc: address-limit checking control
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* @ssi: suppress-suspended interruption
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* @zcc: zero condition code
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* @ectl: extended control
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* @pno: path not operational
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* @res: reserved
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* @fctl: function control
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* @actl: activity control
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* @stctl: status control
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* @cpa: channel program address
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* @dstat: device status
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* @cstat: subchannel status
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* @count: residual count
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*/
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struct cmd_scsw {
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__u32 key : 4;
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__u32 sctl : 1;
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__u32 eswf : 1;
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__u32 cc : 2;
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__u32 fmt : 1;
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__u32 pfch : 1;
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__u32 isic : 1;
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__u32 alcc : 1;
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__u32 ssi : 1;
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__u32 zcc : 1;
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__u32 ectl : 1;
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__u32 pno : 1;
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__u32 res : 1;
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__u32 fctl : 3;
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__u32 actl : 7;
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__u32 stctl : 5;
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__u32 cpa;
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__u32 dstat : 8;
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__u32 cstat : 8;
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__u32 count : 16;
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} __attribute__ ((packed));
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/**
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* struct tm_scsw - transport-mode subchannel status word
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* @key: subchannel key
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* @eswf: esw format
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* @cc: deferred condition code
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* @fmt: format
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* @x: IRB-format control
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* @q: interrogate-complete
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* @ectl: extended control
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* @pno: path not operational
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* @fctl: function control
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* @actl: activity control
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* @stctl: status control
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* @tcw: TCW address
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* @dstat: device status
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* @cstat: subchannel status
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* @fcxs: FCX status
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* @schxs: subchannel-extended status
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*/
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struct tm_scsw {
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u32 key:4;
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u32 :1;
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u32 eswf:1;
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u32 cc:2;
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u32 fmt:3;
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u32 x:1;
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u32 q:1;
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u32 :1;
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u32 ectl:1;
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u32 pno:1;
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u32 :1;
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u32 fctl:3;
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u32 actl:7;
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u32 stctl:5;
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u32 tcw;
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u32 dstat:8;
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u32 cstat:8;
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u32 fcxs:8;
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u32 schxs:8;
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} __attribute__ ((packed));
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/**
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* union scsw - subchannel status word
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* @cmd: command-mode SCSW
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* @tm: transport-mode SCSW
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*/
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union scsw {
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struct cmd_scsw cmd;
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struct tm_scsw tm;
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} __attribute__ ((packed));
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int scsw_is_tm(union scsw *scsw);
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u32 scsw_key(union scsw *scsw);
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u32 scsw_eswf(union scsw *scsw);
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u32 scsw_cc(union scsw *scsw);
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u32 scsw_ectl(union scsw *scsw);
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u32 scsw_pno(union scsw *scsw);
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u32 scsw_fctl(union scsw *scsw);
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u32 scsw_actl(union scsw *scsw);
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u32 scsw_stctl(union scsw *scsw);
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u32 scsw_dstat(union scsw *scsw);
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u32 scsw_cstat(union scsw *scsw);
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int scsw_is_solicited(union scsw *scsw);
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int scsw_is_valid_key(union scsw *scsw);
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int scsw_is_valid_eswf(union scsw *scsw);
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int scsw_is_valid_cc(union scsw *scsw);
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int scsw_is_valid_ectl(union scsw *scsw);
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int scsw_is_valid_pno(union scsw *scsw);
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int scsw_is_valid_fctl(union scsw *scsw);
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int scsw_is_valid_actl(union scsw *scsw);
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int scsw_is_valid_stctl(union scsw *scsw);
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int scsw_is_valid_dstat(union scsw *scsw);
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int scsw_is_valid_cstat(union scsw *scsw);
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int scsw_cmd_is_valid_key(union scsw *scsw);
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int scsw_cmd_is_valid_sctl(union scsw *scsw);
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int scsw_cmd_is_valid_eswf(union scsw *scsw);
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int scsw_cmd_is_valid_cc(union scsw *scsw);
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int scsw_cmd_is_valid_fmt(union scsw *scsw);
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int scsw_cmd_is_valid_pfch(union scsw *scsw);
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int scsw_cmd_is_valid_isic(union scsw *scsw);
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int scsw_cmd_is_valid_alcc(union scsw *scsw);
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int scsw_cmd_is_valid_ssi(union scsw *scsw);
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int scsw_cmd_is_valid_zcc(union scsw *scsw);
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int scsw_cmd_is_valid_ectl(union scsw *scsw);
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int scsw_cmd_is_valid_pno(union scsw *scsw);
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int scsw_cmd_is_valid_fctl(union scsw *scsw);
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int scsw_cmd_is_valid_actl(union scsw *scsw);
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int scsw_cmd_is_valid_stctl(union scsw *scsw);
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int scsw_cmd_is_valid_dstat(union scsw *scsw);
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int scsw_cmd_is_valid_cstat(union scsw *scsw);
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int scsw_cmd_is_solicited(union scsw *scsw);
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int scsw_tm_is_valid_key(union scsw *scsw);
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int scsw_tm_is_valid_eswf(union scsw *scsw);
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int scsw_tm_is_valid_cc(union scsw *scsw);
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int scsw_tm_is_valid_fmt(union scsw *scsw);
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int scsw_tm_is_valid_x(union scsw *scsw);
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int scsw_tm_is_valid_q(union scsw *scsw);
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int scsw_tm_is_valid_ectl(union scsw *scsw);
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int scsw_tm_is_valid_pno(union scsw *scsw);
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int scsw_tm_is_valid_fctl(union scsw *scsw);
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int scsw_tm_is_valid_actl(union scsw *scsw);
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int scsw_tm_is_valid_stctl(union scsw *scsw);
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int scsw_tm_is_valid_dstat(union scsw *scsw);
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int scsw_tm_is_valid_cstat(union scsw *scsw);
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int scsw_tm_is_valid_fcxs(union scsw *scsw);
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int scsw_tm_is_valid_schxs(union scsw *scsw);
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int scsw_tm_is_solicited(union scsw *scsw);
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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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/**
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* struct ccw1 - channel command word
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* @cmd_code: command code
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* @flags: flags, like IDA adressing, etc.
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* @count: byte count
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* @cda: data address
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*
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* The ccw is the basic structure to build channel programs that perform
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* operations with the device or the control unit. Only Format-1 channel
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* command words are supported.
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*/
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struct ccw1 {
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__u8 cmd_code;
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__u8 flags;
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__u16 count;
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__u32 cda;
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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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/**
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* struct erw - extended report word
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* @res0: reserved
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* @auth: authorization check
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* @pvrf: path-verification-required flag
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* @cpt: channel-path timeout
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* @fsavf: failing storage address validity flag
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* @cons: concurrent sense
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* @scavf: secondary ccw address validity flag
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* @fsaf: failing storage address format
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* @scnt: sense count, if @cons == %1
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* @res16: reserved
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*/
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struct erw {
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__u32 res0 : 3;
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__u32 auth : 1;
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__u32 pvrf : 1;
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__u32 cpt : 1;
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__u32 fsavf : 1;
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__u32 cons : 1;
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__u32 scavf : 1;
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__u32 fsaf : 1;
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__u32 scnt : 6;
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__u32 res16 : 16;
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} __attribute__ ((packed));
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/**
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* struct sublog - subchannel logout area
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* @res0: reserved
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* @esf: extended status flags
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* @lpum: last path used mask
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* @arep: ancillary report
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* @fvf: field-validity flags
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* @sacc: storage access code
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* @termc: termination code
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* @devsc: device-status check
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* @serr: secondary error
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* @ioerr: i/o-error alert
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* @seqc: sequence code
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*/
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struct sublog {
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__u32 res0 : 1;
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__u32 esf : 7;
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__u32 lpum : 8;
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__u32 arep : 1;
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__u32 fvf : 5;
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__u32 sacc : 2;
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__u32 termc : 2;
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__u32 devsc : 1;
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__u32 serr : 1;
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__u32 ioerr : 1;
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__u32 seqc : 3;
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} __attribute__ ((packed));
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/**
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* struct esw0 - Format 0 Extended Status Word (ESW)
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* @sublog: subchannel logout
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* @erw: extended report word
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* @faddr: failing storage address
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* @saddr: secondary ccw address
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*/
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struct esw0 {
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struct sublog sublog;
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struct erw erw;
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__u32 faddr[2];
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__u32 saddr;
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} __attribute__ ((packed));
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/**
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* struct esw1 - Format 1 Extended Status Word (ESW)
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* @zero0: reserved zeros
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* @lpum: last path used mask
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* @zero16: reserved zeros
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* @erw: extended report word
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* @zeros: three fullwords of zeros
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*/
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struct esw1 {
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__u8 zero0;
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__u8 lpum;
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__u16 zero16;
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struct erw erw;
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__u32 zeros[3];
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} __attribute__ ((packed));
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/**
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* struct esw2 - Format 2 Extended Status Word (ESW)
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* @zero0: reserved zeros
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* @lpum: last path used mask
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* @dcti: device-connect-time interval
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* @erw: extended report word
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* @zeros: three fullwords of zeros
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*/
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struct esw2 {
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__u8 zero0;
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__u8 lpum;
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__u16 dcti;
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struct erw erw;
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__u32 zeros[3];
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} __attribute__ ((packed));
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/**
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* struct esw3 - Format 3 Extended Status Word (ESW)
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* @zero0: reserved zeros
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* @lpum: last path used mask
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* @res: reserved
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* @erw: extended report word
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* @zeros: three fullwords of zeros
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*/
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struct esw3 {
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__u8 zero0;
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__u8 lpum;
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__u16 res;
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struct erw erw;
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__u32 zeros[3];
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} __attribute__ ((packed));
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/**
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* struct irb - interruption response block
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* @scsw: subchannel status word
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* @esw: extened status word, 4 formats
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* @ecw: extended control word
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*
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* The irb that is handed to the device driver when an interrupt occurs. For
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* solicited interrupts, the common I/O layer already performs checks whether
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* a field is valid; a field not being valid is always passed as %0.
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* If a unit check occured, @ecw may contain sense data; this is retrieved
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* by the common I/O layer itself if the device doesn't support concurrent
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* sense (so that the device driver never needs to perform basic sene itself).
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* For unsolicited interrupts, the irb is passed as-is (expect for sense data,
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* if applicable).
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*/
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struct irb {
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union scsw scsw;
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union {
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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];
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} __attribute__ ((packed,aligned(4)));
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/**
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* struct ciw - command information word (CIW) layout
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* @et: entry type
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* @reserved: reserved bits
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* @ct: command type
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* @cmd: command code
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* @count: command count
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*/
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struct ciw {
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__u32 et : 2;
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__u32 reserved : 2;
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__u32 ct : 4;
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__u32 cmd : 8;
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__u32 count : 16;
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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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/**
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* struct ccw_dev_id - unique identifier for ccw devices
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* @ssid: subchannel set id
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* @devno: device number
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*
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* This structure is not directly based on any hardware structure. The
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* hardware identifies a device by its device number and its subchannel,
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* which is in turn identified by its id. In order to get a unique identifier
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* for ccw devices across subchannel sets, @struct ccw_dev_id has been
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* introduced.
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*/
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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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/**
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* ccw_device_id_is_equal() - compare two ccw_dev_ids
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|
* @dev_id1: a ccw_dev_id
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|
* @dev_id2: another ccw_dev_id
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|
* Returns:
|
|
* %1 if the two structures are equal field-by-field,
|
|
* %0 if not.
|
|
* Context:
|
|
* any
|
|
*/
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|
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 void wait_cons_dev(void);
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|
|
|
extern void css_schedule_reprobe(void);
|
|
|
|
extern void reipl_ccw_dev(struct ccw_dev_id *id);
|
|
|
|
struct cio_iplinfo {
|
|
u16 devno;
|
|
int is_qdio;
|
|
};
|
|
|
|
extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
|
|
|
|
/* Function from drivers/s390/cio/chsc.c */
|
|
int chsc_sstpc(void *page, unsigned int op, u16 ctrl);
|
|
int chsc_sstpi(void *page, void *result, size_t size);
|
|
|
|
#endif
|
|
|
|
#endif
|