arch/s390/include/asm/cio.h - kernel/lockdown - Git at Google

 /*
  * 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>

 #define LPM_ANYPATH 0xff
 #define __MAX_CSSID 0
 #define __MAX_SUBCHANNEL 65535
 #define __MAX_SSID 3

 #include <asm/scsw.h>

 /**
  * struct ccw1 - channel command word
  * @cmd_code: command code
  * @flags: flags, like IDA addressing, 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 erw_eadm - EADM Subchannel extended report word
  * @b: aob error
  * @r: arsb error
  */
 struct erw_eadm {
 	__u32 : 16;
 	__u32 b : 1;
 	__u32 r : 1;
 	__u32  : 14;
 } __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 esw_eadm - EADM Subchannel Extended Status Word (ESW)
  * @sublog: subchannel logout
  * @erw: extended report word
  */
 struct esw_eadm {
 	__u32 sublog;
 	struct erw_eadm erw;
 	__u32 : 32;
 	__u32 : 32;
 	__u32 : 32;
 } __packed;

 /**
  * struct irb - interruption response block
  * @scsw: subchannel status word
  * @esw: extened status word
  * @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 occurred, @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;
 		struct esw_eadm eadm;
 	} 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
 /* Device did not respond in time. */
 #define CIO_BOXED      0x0010

 /**
  * 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;
 }

 void channel_subsystem_reinit(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
	/*
	* 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>

	#define LPM_ANYPATH 0xff
	#define __MAX_CSSID 0
	#define __MAX_SUBCHANNEL 65535
	#define __MAX_SSID 3

	#include <asm/scsw.h>

	/**
	* struct ccw1 - channel command word
	* @cmd_code: command code
	* @flags: flags, like IDA addressing, 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 erw_eadm - EADM Subchannel extended report word
	* @b: aob error
	* @r: arsb error
	*/
	struct erw_eadm {
	__u32 : 16;
	__u32 b : 1;
	__u32 r : 1;
	__u32 : 14;
	} __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 esw_eadm - EADM Subchannel Extended Status Word (ESW)
	* @sublog: subchannel logout
	* @erw: extended report word
	*/
	struct esw_eadm {
	__u32 sublog;
	struct erw_eadm erw;
	__u32 : 32;
	__u32 : 32;
	__u32 : 32;
	} __packed;

	/**
	* struct irb - interruption response block
	* @scsw: subchannel status word
	* @esw: extened status word
	* @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 occurred, @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;
	struct esw_eadm eadm;
	} 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
	/* Device did not respond in time. */
	#define CIO_BOXED 0x0010

	/**
	* 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;
	}

	void channel_subsystem_reinit(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