[linux-block.git] / include / asm-s390 / cio.h

/*
 *  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
#define __MAX_CSSID 0

/**
 * struct cmd_scsw - command-mode subchannel status word
 * @key: subchannel key
 * @sctl: suspend control
 * @eswf: esw format
 * @cc: deferred condition code
 * @fmt: format
 * @pfch: prefetch
 * @isic: initial-status interruption control
 * @alcc: address-limit checking control
 * @ssi: suppress-suspended interruption
 * @zcc: zero condition code
 * @ectl: extended control
 * @pno: path not operational
 * @res: reserved
 * @fctl: function control
 * @actl: activity control
 * @stctl: status control
 * @cpa: channel program address
 * @dstat: device status
 * @cstat: subchannel status
 * @count: residual count
 */
struct cmd_scsw {
	__u32 key  : 4;
	__u32 sctl : 1;
	__u32 eswf : 1;
	__u32 cc   : 2;
	__u32 fmt  : 1;
	__u32 pfch : 1;
	__u32 isic : 1;
	__u32 alcc : 1;
	__u32 ssi  : 1;
	__u32 zcc  : 1;
	__u32 ectl : 1;
	__u32 pno  : 1;
	__u32 res  : 1;
	__u32 fctl : 3;
	__u32 actl : 7;
	__u32 stctl : 5;
	__u32 cpa;
	__u32 dstat : 8;
	__u32 cstat : 8;
	__u32 count : 16;
} __attribute__ ((packed));

/**
 * struct tm_scsw - transport-mode subchannel status word
 * @key: subchannel key
 * @eswf: esw format
 * @cc: deferred condition code
 * @fmt: format
 * @x: IRB-format control
 * @q: interrogate-complete
 * @ectl: extended control
 * @pno: path not operational
 * @fctl: function control
 * @actl: activity control
 * @stctl: status control
 * @tcw: TCW address
 * @dstat: device status
 * @cstat: subchannel status
 * @fcxs: FCX status
 * @schxs: subchannel-extended status
 */
struct tm_scsw {
	u32 key:4;
	u32 :1;
	u32 eswf:1;
	u32 cc:2;
	u32 fmt:3;
	u32 x:1;
	u32 q:1;
	u32 :1;
	u32 ectl:1;
	u32 pno:1;
	u32 :1;
	u32 fctl:3;
	u32 actl:7;
	u32 stctl:5;
	u32 tcw;
	u32 dstat:8;
	u32 cstat:8;
	u32 fcxs:8;
	u32 schxs:8;
} __attribute__ ((packed));

/**
 * union scsw - subchannel status word
 * @cmd: command-mode SCSW
 * @tm: transport-mode SCSW
 */
union scsw {
	struct cmd_scsw cmd;
	struct tm_scsw tm;
} __attribute__ ((packed));

int scsw_is_tm(union scsw *scsw);
u32 scsw_key(union scsw *scsw);
u32 scsw_eswf(union scsw *scsw);
u32 scsw_cc(union scsw *scsw);
u32 scsw_ectl(union scsw *scsw);
u32 scsw_pno(union scsw *scsw);
u32 scsw_fctl(union scsw *scsw);
u32 scsw_actl(union scsw *scsw);
u32 scsw_stctl(union scsw *scsw);
u32 scsw_dstat(union scsw *scsw);
u32 scsw_cstat(union scsw *scsw);
int scsw_is_solicited(union scsw *scsw);
int scsw_is_valid_key(union scsw *scsw);
int scsw_is_valid_eswf(union scsw *scsw);
int scsw_is_valid_cc(union scsw *scsw);
int scsw_is_valid_ectl(union scsw *scsw);
int scsw_is_valid_pno(union scsw *scsw);
int scsw_is_valid_fctl(union scsw *scsw);
int scsw_is_valid_actl(union scsw *scsw);
int scsw_is_valid_stctl(union scsw *scsw);
int scsw_is_valid_dstat(union scsw *scsw);
int scsw_is_valid_cstat(union scsw *scsw);
int scsw_cmd_is_valid_key(union scsw *scsw);
int scsw_cmd_is_valid_sctl(union scsw *scsw);
int scsw_cmd_is_valid_eswf(union scsw *scsw);
int scsw_cmd_is_valid_cc(union scsw *scsw);
int scsw_cmd_is_valid_fmt(union scsw *scsw);
int scsw_cmd_is_valid_pfch(union scsw *scsw);
int scsw_cmd_is_valid_isic(union scsw *scsw);
int scsw_cmd_is_valid_alcc(union scsw *scsw);
int scsw_cmd_is_valid_ssi(union scsw *scsw);
int scsw_cmd_is_valid_zcc(union scsw *scsw);
int scsw_cmd_is_valid_ectl(union scsw *scsw);
int scsw_cmd_is_valid_pno(union scsw *scsw);
int scsw_cmd_is_valid_fctl(union scsw *scsw);
int scsw_cmd_is_valid_actl(union scsw *scsw);
int scsw_cmd_is_valid_stctl(union scsw *scsw);
int scsw_cmd_is_valid_dstat(union scsw *scsw);
int scsw_cmd_is_valid_cstat(union scsw *scsw);
int scsw_cmd_is_solicited(union scsw *scsw);
int scsw_tm_is_valid_key(union scsw *scsw);
int scsw_tm_is_valid_eswf(union scsw *scsw);
int scsw_tm_is_valid_cc(union scsw *scsw);
int scsw_tm_is_valid_fmt(union scsw *scsw);
int scsw_tm_is_valid_x(union scsw *scsw);
int scsw_tm_is_valid_q(union scsw *scsw);
int scsw_tm_is_valid_ectl(union scsw *scsw);
int scsw_tm_is_valid_pno(union scsw *scsw);
int scsw_tm_is_valid_fctl(union scsw *scsw);
int scsw_tm_is_valid_actl(union scsw *scsw);
int scsw_tm_is_valid_stctl(union scsw *scsw);
int scsw_tm_is_valid_dstat(union scsw *scsw);
int scsw_tm_is_valid_cstat(union scsw *scsw);
int scsw_tm_is_valid_fcxs(union scsw *scsw);
int scsw_tm_is_valid_schxs(union scsw *scsw);
int scsw_tm_is_solicited(union scsw *scsw);

#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 - channel command word
 * @cmd_code: command code
 * @flags: flags, like IDA adressing, etc.
 * @count: byte count
 * @cda: data address
 *
 * The ccw is the basic structure to build channel programs that perform
 * operations with the device or the control unit. Only Format-1 channel
 * command words are supported.
 */
struct ccw1 {
	__u8  cmd_code;
	__u8  flags;
	__u16 count;
	__u32 cda;
} __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 - extended report word
 * @res0: reserved
 * @auth: authorization check
 * @pvrf: path-verification-required flag
 * @cpt: channel-path timeout
 * @fsavf: failing storage address validity flag
 * @cons: concurrent sense
 * @scavf: secondary ccw address validity flag
 * @fsaf: failing storage address format
 * @scnt: sense count, if @cons == %1
 * @res16: reserved
 */
struct erw {
	__u32 res0  : 3;
	__u32 auth  : 1;
	__u32 pvrf  : 1;
	__u32 cpt   : 1;
	__u32 fsavf : 1;
	__u32 cons  : 1;
	__u32 scavf : 1;
	__u32 fsaf  : 1;
	__u32 scnt  : 6;
	__u32 res16 : 16;
} __attribute__ ((packed));

/**
 * struct sublog - subchannel logout area
 * @res0: reserved
 * @esf: extended status flags
 * @lpum: last path used mask
 * @arep: ancillary report
 * @fvf: field-validity flags
 * @sacc: storage access code
 * @termc: termination code
 * @devsc: device-status check
 * @serr: secondary error
 * @ioerr: i/o-error alert
 * @seqc: sequence code
 */
struct sublog {
	__u32 res0  : 1;
	__u32 esf   : 7;
	__u32 lpum  : 8;
	__u32 arep  : 1;
	__u32 fvf   : 5;
	__u32 sacc  : 2;
	__u32 termc : 2;
	__u32 devsc : 1;
	__u32 serr  : 1;
	__u32 ioerr : 1;
	__u32 seqc  : 3;
} __attribute__ ((packed));

/**
 * struct esw0 - Format 0 Extended Status Word (ESW)
 * @sublog: subchannel logout
 * @erw: extended report word
 * @faddr: failing storage address
 * @saddr: secondary ccw address
 */
struct esw0 {
	struct sublog sublog;
	struct erw erw;
	__u32  faddr[2];
	__u32  saddr;
} __attribute__ ((packed));

/**
 * struct esw1 - Format 1 Extended Status Word (ESW)
 * @zero0: reserved zeros
 * @lpum: last path used mask
 * @zero16: reserved zeros
 * @erw: extended report word
 * @zeros: three fullwords of zeros
 */
struct esw1 {
	__u8  zero0;
	__u8  lpum;
	__u16 zero16;
	struct erw erw;
	__u32 zeros[3];
} __attribute__ ((packed));

/**
 * struct esw2 - Format 2 Extended Status Word (ESW)
 * @zero0: reserved zeros
 * @lpum: last path used mask
 * @dcti: device-connect-time interval
 * @erw: extended report word
 * @zeros: three fullwords of zeros
 */
struct esw2 {
	__u8  zero0;
	__u8  lpum;
	__u16 dcti;
	struct erw erw;
	__u32 zeros[3];
} __attribute__ ((packed));

/**
 * struct esw3 - Format 3 Extended Status Word (ESW)
 * @zero0: reserved zeros
 * @lpum: last path used mask
 * @res: reserved
 * @erw: extended report word
 * @zeros: three fullwords of zeros
 */
struct esw3 {
	__u8  zero0;
	__u8  lpum;
	__u16 res;
	struct erw erw;
	__u32 zeros[3];
} __attribute__ ((packed));

/**
 * struct irb - interruption response block
 * @scsw: subchannel status word
 * @esw: extened status word, 4 formats
 * @ecw: extended control word
 *
 * The irb that is handed to the device driver when an interrupt occurs. For
 * solicited interrupts, the common I/O layer already performs checks whether
 * a field is valid; a field not being valid is always passed as %0.
 * If a unit check occured, @ecw may contain sense data; this is retrieved
 * by the common I/O layer itself if the device doesn't support concurrent
 * sense (so that the device driver never needs to perform basic sene itself).
 * For unsolicited interrupts, the irb is passed as-is (expect for sense data,
 * if applicable).
 */
struct irb {
	union scsw scsw;
	union {
		struct esw0 esw0;
		struct esw1 esw1;
		struct esw2 esw2;
		struct esw3 esw3;
	} esw;
	__u8   ecw[32];
} __attribute__ ((packed,aligned(4)));

/**
 * struct ciw - command information word  (CIW) layout
 * @et: entry type
 * @reserved: reserved bits
 * @ct: command type
 * @cmd: command code
 * @count: command count
 */
struct ciw {
	__u32 et       :  2;
	__u32 reserved :  2;
	__u32 ct       :  4;
	__u32 cmd      :  8;
	__u32 count    : 16;
} __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 ccw_dev_id - unique identifier for ccw devices
 * @ssid: subchannel set id
 * @devno: device number
 *
 * This structure is not directly based on any hardware structure. The
 * hardware identifies a device by its device number and its subchannel,
 * which is in turn identified by its id. In order to get a unique identifier
 * for ccw devices across subchannel sets, @struct ccw_dev_id has been
 * introduced.
 */
struct ccw_dev_id {
	u8 ssid;
	u16 devno;
};

/**
 * ccw_device_id_is_equal() - compare two ccw_dev_ids
 * @dev_id1: a ccw_dev_id
 * @dev_id2: another ccw_dev_id
 * Returns:
 *  %1 if the two structures are equal field-by-field,
 *  %0 if not.
 * Context:
 *  any
 */
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);

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
Commit	Line	Data
1da177e4 LT	1	/*
	2	* include/asm-s390/cio.h
	3	* include/asm-s390x/cio.h
	4	*
	5	* Common interface for I/O on S/390
	6	*/
	7	#ifndef _ASM_S390_CIO_H_
	8	#define _ASM_S390_CIO_H_
	9
	10	#include <linux/spinlock.h>
	11	#include <asm/types.h>
	12
	13	#ifdef __KERNEL__
	14
	15	#define LPM_ANYPATH 0xff
e5854a58	16	#define __MAX_CSSID 0
1da177e4	17
b2ffd8e9	18	/**
23d805b6	19	* struct cmd_scsw - command-mode subchannel status word
b2ffd8e9 CH	20	* @key: subchannel key
	21	* @sctl: suspend control
	22	* @eswf: esw format
	23	* @cc: deferred condition code
	24	* @fmt: format
	25	* @pfch: prefetch
	26	* @isic: initial-status interruption control
5800266a JP	27	* @alcc: address-limit checking control
5800266a JP	28	* @ssi: suppress-suspended interruption
b2ffd8e9 CH	29	* @zcc: zero condition code
	30	* @ectl: extended control
	31	* @pno: path not operational
	32	* @res: reserved
	33	* @fctl: function control
	34	* @actl: activity control
	35	* @stctl: status control
	36	* @cpa: channel program address
	37	* @dstat: device status
	38	* @cstat: subchannel status
	39	* @count: residual count
1da177e4	40	*/
23d805b6	41	struct cmd_scsw {
b2ffd8e9 CH	42	__u32 key : 4;
	43	__u32 sctl : 1;
	44	__u32 eswf : 1;
	45	__u32 cc : 2;
	46	__u32 fmt : 1;
	47	__u32 pfch : 1;
	48	__u32 isic : 1;
	49	__u32 alcc : 1;
	50	__u32 ssi : 1;
	51	__u32 zcc : 1;
	52	__u32 ectl : 1;
	53	__u32 pno : 1;
	54	__u32 res : 1;
	55	__u32 fctl : 3;
	56	__u32 actl : 7;
	57	__u32 stctl : 5;
	58	__u32 cpa;
	59	__u32 dstat : 8;
	60	__u32 cstat : 8;
	61	__u32 count : 16;
1da177e4 LT	62	} __attribute__ ((packed));
1da177e4 LT	63
23d805b6 PO	64	/**
	65	* struct tm_scsw - transport-mode subchannel status word
	66	* @key: subchannel key
	67	* @eswf: esw format
	68	* @cc: deferred condition code
	69	* @fmt: format
	70	* @x: IRB-format control
	71	* @q: interrogate-complete
	72	* @ectl: extended control
	73	* @pno: path not operational
	74	* @fctl: function control
	75	* @actl: activity control
	76	* @stctl: status control
	77	* @tcw: TCW address
	78	* @dstat: device status
	79	* @cstat: subchannel status
	80	* @fcxs: FCX status
	81	* @schxs: subchannel-extended status
	82	*/
	83	struct tm_scsw {
	84	u32 key:4;
	85	u32 :1;
	86	u32 eswf:1;
	87	u32 cc:2;
	88	u32 fmt:3;
	89	u32 x:1;
	90	u32 q:1;
	91	u32 :1;
	92	u32 ectl:1;
	93	u32 pno:1;
	94	u32 :1;
	95	u32 fctl:3;
	96	u32 actl:7;
	97	u32 stctl:5;
	98	u32 tcw;
	99	u32 dstat:8;
	100	u32 cstat:8;
	101	u32 fcxs:8;
	102	u32 schxs:8;
	103	} __attribute__ ((packed));
	104
	105	/**
	106	* union scsw - subchannel status word
	107	* @cmd: command-mode SCSW
	108	* @tm: transport-mode SCSW
	109	*/
	110	union scsw {
	111	struct cmd_scsw cmd;
	112	struct tm_scsw tm;
	113	} __attribute__ ((packed));
	114
	115	int scsw_is_tm(union scsw *scsw);
	116	u32 scsw_key(union scsw *scsw);
	117	u32 scsw_eswf(union scsw *scsw);
	118	u32 scsw_cc(union scsw *scsw);
	119	u32 scsw_ectl(union scsw *scsw);
	120	u32 scsw_pno(union scsw *scsw);
	121	u32 scsw_fctl(union scsw *scsw);
	122	u32 scsw_actl(union scsw *scsw);
	123	u32 scsw_stctl(union scsw *scsw);
	124	u32 scsw_dstat(union scsw *scsw);
	125	u32 scsw_cstat(union scsw *scsw);
	126	int scsw_is_solicited(union scsw *scsw);
	127	int scsw_is_valid_key(union scsw *scsw);
128	int scsw_is_valid_eswf(union scsw *scsw);
129	int scsw_is_valid_cc(union scsw *scsw);
130	int scsw_is_valid_ectl(union scsw *scsw);
131	int scsw_is_valid_pno(union scsw *scsw);
132	int scsw_is_valid_fctl(union scsw *scsw);
133	int scsw_is_valid_actl(union scsw *scsw);
134	int scsw_is_valid_stctl(union scsw *scsw);
135	int scsw_is_valid_dstat(union scsw *scsw);
136	int scsw_is_valid_cstat(union scsw *scsw);
137	int scsw_cmd_is_valid_key(union scsw *scsw);
138	int scsw_cmd_is_valid_sctl(union scsw *scsw);
139	int scsw_cmd_is_valid_eswf(union scsw *scsw);
140	int scsw_cmd_is_valid_cc(union scsw *scsw);
141	int scsw_cmd_is_valid_fmt(union scsw *scsw);
142	int scsw_cmd_is_valid_pfch(union scsw *scsw);
143	int scsw_cmd_is_valid_isic(union scsw *scsw);
144	int scsw_cmd_is_valid_alcc(union scsw *scsw);
145	int scsw_cmd_is_valid_ssi(union scsw *scsw);
146	int scsw_cmd_is_valid_zcc(union scsw *scsw);
147	int scsw_cmd_is_valid_ectl(union scsw *scsw);
148	int scsw_cmd_is_valid_pno(union scsw *scsw);
149	int scsw_cmd_is_valid_fctl(union scsw *scsw);
150	int scsw_cmd_is_valid_actl(union scsw *scsw);
151	int scsw_cmd_is_valid_stctl(union scsw *scsw);
152	int scsw_cmd_is_valid_dstat(union scsw *scsw);
153	int scsw_cmd_is_valid_cstat(union scsw *scsw);
154	int scsw_cmd_is_solicited(union scsw *scsw);
155	int scsw_tm_is_valid_key(union scsw *scsw);
156	int scsw_tm_is_valid_eswf(union scsw *scsw);
157	int scsw_tm_is_valid_cc(union scsw *scsw);
158	int scsw_tm_is_valid_fmt(union scsw *scsw);
159	int scsw_tm_is_valid_x(union scsw *scsw);
160	int scsw_tm_is_valid_q(union scsw *scsw);
161	int scsw_tm_is_valid_ectl(union scsw *scsw);
162	int scsw_tm_is_valid_pno(union scsw *scsw);
163	int scsw_tm_is_valid_fctl(union scsw *scsw);
164	int scsw_tm_is_valid_actl(union scsw *scsw);
165	int scsw_tm_is_valid_stctl(union scsw *scsw);
166	int scsw_tm_is_valid_dstat(union scsw *scsw);
167	int scsw_tm_is_valid_cstat(union scsw *scsw);
168	int scsw_tm_is_valid_fcxs(union scsw *scsw);
169	int scsw_tm_is_valid_schxs(union scsw *scsw);
170	int scsw_tm_is_solicited(union scsw *scsw);
171
1da177e4 LT	172	#define SCSW_FCTL_CLEAR_FUNC 0x1
	173	#define SCSW_FCTL_HALT_FUNC 0x2
	174	#define SCSW_FCTL_START_FUNC 0x4
	175
	176	#define SCSW_ACTL_SUSPENDED 0x1
	177	#define SCSW_ACTL_DEVACT 0x2
	178	#define SCSW_ACTL_SCHACT 0x4
	179	#define SCSW_ACTL_CLEAR_PEND 0x8
	180	#define SCSW_ACTL_HALT_PEND 0x10
	181	#define SCSW_ACTL_START_PEND 0x20
	182	#define SCSW_ACTL_RESUME_PEND 0x40
	183
	184	#define SCSW_STCTL_STATUS_PEND 0x1
	185	#define SCSW_STCTL_SEC_STATUS 0x2
	186	#define SCSW_STCTL_PRIM_STATUS 0x4
	187	#define SCSW_STCTL_INTER_STATUS 0x8
	188	#define SCSW_STCTL_ALERT_STATUS 0x10
	189
	190	#define DEV_STAT_ATTENTION 0x80
	191	#define DEV_STAT_STAT_MOD 0x40
	192	#define DEV_STAT_CU_END 0x20
	193	#define DEV_STAT_BUSY 0x10
	194	#define DEV_STAT_CHN_END 0x08
	195	#define DEV_STAT_DEV_END 0x04
	196	#define DEV_STAT_UNIT_CHECK 0x02
	197	#define DEV_STAT_UNIT_EXCEP 0x01
	198
	199	#define SCHN_STAT_PCI 0x80
	200	#define SCHN_STAT_INCORR_LEN 0x40
	201	#define SCHN_STAT_PROG_CHECK 0x20
	202	#define SCHN_STAT_PROT_CHECK 0x10
	203	#define SCHN_STAT_CHN_DATA_CHK 0x08
	204	#define SCHN_STAT_CHN_CTRL_CHK 0x04
	205	#define SCHN_STAT_INTF_CTRL_CHK 0x02
	206	#define SCHN_STAT_CHAIN_CHECK 0x01
	207
	208	/*
	209	* architectured values for first sense byte
	210	*/
	211	#define SNS0_CMD_REJECT 0x80
	212	#define SNS_CMD_REJECT SNS0_CMD_REJEC
	213	#define SNS0_INTERVENTION_REQ 0x40
	214	#define SNS0_BUS_OUT_CHECK 0x20
	215	#define SNS0_EQUIPMENT_CHECK 0x10
	216	#define SNS0_DATA_CHECK 0x08
	217	#define SNS0_OVERRUN 0x04
	218	#define SNS0_INCOMPL_DOMAIN 0x01
	219
	220	/*
	221	* architectured values for second sense byte
	222	*/
	223	#define SNS1_PERM_ERR 0x80
	224	#define SNS1_INV_TRACK_FORMAT 0x40
	225	#define SNS1_EOC 0x20
	226	#define SNS1_MESSAGE_TO_OPER 0x10
	227	#define SNS1_NO_REC_FOUND 0x08
	228	#define SNS1_FILE_PROTECTED 0x04
	229	#define SNS1_WRITE_INHIBITED 0x02
	230	#define SNS1_INPRECISE_END 0x01
	231
	232	/*
	233	* architectured values for third sense byte
	234	*/
	235	#define SNS2_REQ_INH_WRITE 0x80
236	#define SNS2_CORRECTABLE 0x40
237	#define SNS2_FIRST_LOG_ERR 0x20
238	#define SNS2_ENV_DATA_PRESENT 0x10
239	#define SNS2_INPRECISE_END 0x04
240
b2ffd8e9 CH	241	/**
	242	* struct ccw1 - channel command word
	243	* @cmd_code: command code
	244	* @flags: flags, like IDA adressing, etc.
	245	* @count: byte count
	246	* @cda: data address
	247	*
	248	* The ccw is the basic structure to build channel programs that perform
	249	* operations with the device or the control unit. Only Format-1 channel
	250	* command words are supported.
	251	*/
1da177e4	252	struct ccw1 {
b2ffd8e9 CH	253	__u8 cmd_code;
	254	__u8 flags;
	255	__u16 count;
	256	__u32 cda;
1da177e4 LT	257	} __attribute__ ((packed,aligned(8)));
	258
	259	#define CCW_FLAG_DC 0x80
	260	#define CCW_FLAG_CC 0x40
	261	#define CCW_FLAG_SLI 0x20
	262	#define CCW_FLAG_SKIP 0x10
	263	#define CCW_FLAG_PCI 0x08
	264	#define CCW_FLAG_IDA 0x04
	265	#define CCW_FLAG_SUSPEND 0x02
	266
	267	#define CCW_CMD_READ_IPL 0x02
	268	#define CCW_CMD_NOOP 0x03
	269	#define CCW_CMD_BASIC_SENSE 0x04
	270	#define CCW_CMD_TIC 0x08
	271	#define CCW_CMD_STLCK 0x14
	272	#define CCW_CMD_SENSE_PGID 0x34
	273	#define CCW_CMD_SUSPEND_RECONN 0x5B
	274	#define CCW_CMD_RDC 0x64
	275	#define CCW_CMD_RELEASE 0x94
	276	#define CCW_CMD_SET_PGID 0xAF
	277	#define CCW_CMD_SENSE_ID 0xE4
	278	#define CCW_CMD_DCTL 0xF3
	279
	280	#define SENSE_MAX_COUNT 0x20
	281
b2ffd8e9 CH	282	/**
	283	* struct erw - extended report word
	284	* @res0: reserved
	285	* @auth: authorization check
	286	* @pvrf: path-verification-required flag
	287	* @cpt: channel-path timeout
	288	* @fsavf: failing storage address validity flag
	289	* @cons: concurrent sense
	290	* @scavf: secondary ccw address validity flag
	291	* @fsaf: failing storage address format
	292	* @scnt: sense count, if @cons == %1
	293	* @res16: reserved
	294	*/
1da177e4	295	struct erw {
b2ffd8e9 CH	296	__u32 res0 : 3;
	297	__u32 auth : 1;
	298	__u32 pvrf : 1;
	299	__u32 cpt : 1;
	300	__u32 fsavf : 1;
	301	__u32 cons : 1;
	302	__u32 scavf : 1;
	303	__u32 fsaf : 1;
	304	__u32 scnt : 6;
	305	__u32 res16 : 16;
1da177e4 LT	306	} __attribute__ ((packed));
1da177e4 LT	307
b2ffd8e9 CH	308	/**
	309	* struct sublog - subchannel logout area
	310	* @res0: reserved
	311	* @esf: extended status flags
	312	* @lpum: last path used mask
	313	* @arep: ancillary report
	314	* @fvf: field-validity flags
	315	* @sacc: storage access code
	316	* @termc: termination code
	317	* @devsc: device-status check
	318	* @serr: secondary error
	319	* @ioerr: i/o-error alert
	320	* @seqc: sequence code
1da177e4 LT	321	*/
1da177e4 LT	322	struct sublog {
b2ffd8e9 CH	323	__u32 res0 : 1;
	324	__u32 esf : 7;
	325	__u32 lpum : 8;
	326	__u32 arep : 1;
	327	__u32 fvf : 5;
	328	__u32 sacc : 2;
	329	__u32 termc : 2;
	330	__u32 devsc : 1;
	331	__u32 serr : 1;
	332	__u32 ioerr : 1;
	333	__u32 seqc : 3;
1da177e4 LT	334	} __attribute__ ((packed));
1da177e4 LT	335
b2ffd8e9 CH	336	/**
	337	* struct esw0 - Format 0 Extended Status Word (ESW)
	338	* @sublog: subchannel logout
	339	* @erw: extended report word
	340	* @faddr: failing storage address
	341	* @saddr: secondary ccw address
1da177e4 LT	342	*/
1da177e4 LT	343	struct esw0 {
b2ffd8e9 CH	344	struct sublog sublog;
	345	struct erw erw;
	346	__u32 faddr[2];
	347	__u32 saddr;
1da177e4 LT	348	} __attribute__ ((packed));
1da177e4 LT	349
b2ffd8e9 CH	350	/**
	351	* struct esw1 - Format 1 Extended Status Word (ESW)
	352	* @zero0: reserved zeros
	353	* @lpum: last path used mask
	354	* @zero16: reserved zeros
	355	* @erw: extended report word
	356	* @zeros: three fullwords of zeros
1da177e4 LT	357	*/
1da177e4 LT	358	struct esw1 {
b2ffd8e9 CH	359	__u8 zero0;
	360	__u8 lpum;
	361	__u16 zero16;
	362	struct erw erw;
	363	__u32 zeros[3];
1da177e4 LT	364	} __attribute__ ((packed));
1da177e4 LT	365
b2ffd8e9 CH	366	/**
	367	* struct esw2 - Format 2 Extended Status Word (ESW)
	368	* @zero0: reserved zeros
	369	* @lpum: last path used mask
	370	* @dcti: device-connect-time interval
	371	* @erw: extended report word
	372	* @zeros: three fullwords of zeros
1da177e4 LT	373	*/
1da177e4 LT	374	struct esw2 {
b2ffd8e9 CH	375	__u8 zero0;
	376	__u8 lpum;
	377	__u16 dcti;
	378	struct erw erw;
	379	__u32 zeros[3];
1da177e4 LT	380	} __attribute__ ((packed));
1da177e4 LT	381
b2ffd8e9 CH	382	/**
	383	* struct esw3 - Format 3 Extended Status Word (ESW)
	384	* @zero0: reserved zeros
	385	* @lpum: last path used mask
	386	* @res: reserved
	387	* @erw: extended report word
	388	* @zeros: three fullwords of zeros
1da177e4 LT	389	*/
1da177e4 LT	390	struct esw3 {
b2ffd8e9 CH	391	__u8 zero0;
	392	__u8 lpum;
	393	__u16 res;
	394	struct erw erw;
	395	__u32 zeros[3];
1da177e4 LT	396	} __attribute__ ((packed));
1da177e4 LT	397
b2ffd8e9 CH	398	/**
	399	* struct irb - interruption response block
	400	* @scsw: subchannel status word
	401	* @esw: extened status word, 4 formats
	402	* @ecw: extended control word
	403	*
	404	* The irb that is handed to the device driver when an interrupt occurs. For
	405	* solicited interrupts, the common I/O layer already performs checks whether
	406	* a field is valid; a field not being valid is always passed as %0.
	407	* If a unit check occured, @ecw may contain sense data; this is retrieved
	408	* by the common I/O layer itself if the device doesn't support concurrent
	409	* sense (so that the device driver never needs to perform basic sene itself).
	410	* For unsolicited interrupts, the irb is passed as-is (expect for sense data,
	411	* if applicable).
1da177e4 LT	412	*/
1da177e4 LT	413	struct irb {
23d805b6	414	union scsw scsw;
b2ffd8e9	415	union {
1da177e4 LT	416	struct esw0 esw0;
	417	struct esw1 esw1;
	418	struct esw2 esw2;
	419	struct esw3 esw3;
	420	} esw;
b2ffd8e9	421	__u8 ecw[32];
1da177e4 LT	422	} __attribute__ ((packed,aligned(4)));
1da177e4 LT	423
b2ffd8e9 CH	424	/**
	425	* struct ciw - command information word (CIW) layout
	426	* @et: entry type
	427	* @reserved: reserved bits
	428	* @ct: command type
	429	* @cmd: command code
	430	* @count: command count
1da177e4 LT	431	*/
1da177e4 LT	432	struct ciw {
b2ffd8e9 CH	433	__u32 et : 2;
	434	__u32 reserved : 2;
	435	__u32 ct : 4;
	436	__u32 cmd : 8;
	437	__u32 count : 16;
1da177e4 LT	438	} __attribute__ ((packed));
	439
	440	#define CIW_TYPE_RCD 0x0 /* read configuration data */
	441	#define CIW_TYPE_SII 0x1 /* set interface identifier */
	442	#define CIW_TYPE_RNI 0x2 /* read node identifier */
	443
	444	/*
	445	* Flags used as input parameters for do_IO()
	446	*/
	447	#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
	448	#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
	449	#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
	450	/* ... for suspended CCWs */
	451	/* Device or subchannel gone. */
	452	#define CIO_GONE 0x0001
	453	/* No path to device. */
	454	#define CIO_NO_PATH 0x0002
	455	/* Device has appeared. */
	456	#define CIO_OPER 0x0004
	457	/* Sick revalidation of device. */
	458	#define CIO_REVALIDATE 0x0008
	459
b2ffd8e9 CH	460	/**
	461	* struct ccw_dev_id - unique identifier for ccw devices
	462	* @ssid: subchannel set id
	463	* @devno: device number
	464	*
	465	* This structure is not directly based on any hardware structure. The
	466	* hardware identifies a device by its device number and its subchannel,
	467	* which is in turn identified by its id. In order to get a unique identifier
	468	* for ccw devices across subchannel sets, @struct ccw_dev_id has been
	469	* introduced.
	470	*/
ff6b8ea6 MH	471	struct ccw_dev_id {
	472	u8 ssid;
	473	u16 devno;
	474	};
	475
b2ffd8e9 CH	476	/**
	477	* ccw_device_id_is_equal() - compare two ccw_dev_ids
	478	* @dev_id1: a ccw_dev_id
	479	* @dev_id2: another ccw_dev_id
	480	* Returns:
	481	* %1 if the two structures are equal field-by-field,
	482	* %0 if not.
	483	* Context:
	484	* any
	485	*/
78964268 CH	486	static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
	487	struct ccw_dev_id *dev_id2)
	488	{
ce26a853 CH	489	if ((dev_id1->ssid == dev_id2->ssid) &&
	490	(dev_id1->devno == dev_id2->devno))
	491	return 1;
	492	return 0;
78964268 CH	493	}
78964268 CH	494
1da177e4 LT	495	extern void wait_cons_dev(void);
1da177e4 LT	496
40154b82 PO	497	extern void css_schedule_reprobe(void);
40154b82 PO	498
ff6b8ea6 MH	499	extern void reipl_ccw_dev(struct ccw_dev_id *id);
ff6b8ea6 MH	500
6fc321fd HC	501	struct cio_iplinfo {
	502	u16 devno;
	503	int is_qdio;
	504	};
	505
	506	extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
	507
a806170e HC	508	/* Function from drivers/s390/cio/chsc.c */
	509	int chsc_sstpc(void *page, unsigned int op, u16 ctrl);
	510	int chsc_sstpi(void page, void result, size_t size);
	511
1da177e4 LT	512	#endif
	513
	514	#endif