[S390] z/VM unit record device driver

# CONFIG_VMCP is not set

# CONFIG_MONREADER is not set

CONFIG_MONWRITER=m

CONFIG_S390_VMUR=m

# CONFIG_POWER_SUPPLY is not set

#

	help

	  Character device driver for writing z/VM monitor service records

config S390_VMUR

	tristate "z/VM unit record device driver"

	default "m"

	help

	  Character device driver for z/VM reader, puncher and printer.

obj-$(CONFIG_S390_TAPE_3590) += tape_3590.o

obj-$(CONFIG_MONREADER) += monreader.o

obj-$(CONFIG_MONWRITER) += monwriter.o

obj-$(CONFIG_S390_VMUR) += vmur.o

zcore_mod-objs := sclp_sdias.o zcore.o

obj-$(CONFIG_ZFCPDUMP) += zcore_mod.o

/*

 * Linux driver for System z and s390 unit record devices

 * (z/VM virtual punch, reader, printer)

 *

 * Copyright IBM Corp. 2001, 2007

 * Authors: Malcolm Beattie <beattiem@uk.ibm.com>

 *	    Michael Holzheu <holzheu@de.ibm.com>

 *	    Frank Munzert <munzert@de.ibm.com>

 */

#ifndef _VMUR_H_

#define _VMUR_H_

#define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */

#define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */

/*

 * we only support z/VM's default unit record devices:

 * both in SPOOL directory control statement and in CP DEFINE statement

 *	RDR defaults to 2540 reader

 *	PUN defaults to 2540 punch

 *	PRT defaults to 1403 printer

 */

#define READER_PUNCH_DEVTYPE	0x2540

#define PRINTER_DEVTYPE		0x1403

/* z/VM spool file control block SFBLOK */

struct file_control_block {

	char reserved_1[8];

	char user_owner[8];

	char user_orig[8];

	__s32 data_recs;

	__s16 rec_len;

	__s16 file_num;

	__u8  file_stat;

	__u8  dev_type;

	char  reserved_2[6];

	char  file_name[12];

	char  file_type[12];

	char  create_date[8];

	char  create_time[8];

	char  reserved_3[6];

	__u8  file_class;

	__u8  sfb_lok;

	__u64 distr_code;

	__u32 reserved_4;

	__u8  current_starting_copy_number;

	__u8  sfblock_cntrl_flags;

	__u8  reserved_5;

	__u8  more_status_flags;

	char  rest[200];

} __attribute__ ((packed));

#define FLG_CP_DUMP 0x10

/*

 * A struct urdev is created for each ur device that is made available

 * via the ccw_device driver model.

 */

struct urdev {

	struct ccw_device *cdev;	/* Backpointer to ccw device */

	struct mutex io_mutex;		/* Serialises device IO */

	struct mutex open_mutex;	/* Serialises access to device */

	struct completion *io_done;	/* do_ur_io waits; irq completes */

	struct device *device;

	struct cdev *char_device;

	struct ccw_dev_id dev_id;	/* device id */

	size_t reclen;			/* Record length for *write* CCWs */

	int class;			/* VM device class */

	int io_request_rc;		/* return code from I/O request */

};

/*

 * A struct urfile is allocated at open() time for each device and

 * freed on release().

 */

struct urfile {

	struct urdev *urd;

	unsigned int flags;

	size_t dev_reclen;

	__u16 file_reclen;

};

/*

 * Device major/minor definitions.

 */

#define UR_MAJOR 0	/* get dynamic major */

/*

 * We map minor numbers directly to device numbers (0-FFFF) for simplicity.

 * This avoids having to allocate (and manage) slot numbers.

 */

#define NUM_MINORS 65536

/* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */

#define MAX_RECS_PER_IO		511

#define WRITE_CCW_CMD		0x01

#define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x)

#define CCWDEV_CU_DI(cutype, di) \

		CCW_DEVICE(cutype, 0x00), .driver_info = (di)

#define FILE_RECLEN_OFFSET	4064 /* reclen offset in spool data block */

#endif /* _VMUR_H_ */