/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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_
#include <linux/refcount.h>
#include <linux/workqueue.h>
#define DEV_CLASS_UR_I 0 x20 /* diag210 unit record input device class */
#define DEV_CLASS_UR_O 0 x10 /* 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 0 x2540
#define PRINTER_DEVTYPE 0 x1403
/* 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_SYSTEM_HOLD 0 x04
#define FLG_CP_DUMP 0 x10
#define FLG_USER_HOLD 0 x20
#define FLG_IN_USE 0 x80
/*
* 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 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 */
refcount_t ref_count; /* reference counter */
wait_queue_head_t wait; /* wait queue to serialize open */
int open_flag; /* "urdev is open" flag */
spinlock_t open_lock; /* serialize critical sections */
struct work_struct uevent_work; /* work to send uevent */
};
/*
* 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 0 x01
#define TRACE(x...) debug_sprintf_event(vmur_dbf, 1 , x)
#define CCWDEV_CU_DI(cutype, di) \
CCW_DEVICE(cutype, 0 x00), .driver_info = (di)
#define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */
#endif /* _VMUR_H_ */
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