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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Linux driver for System z and s390 unit record devices4 * (z/VM virtual punch, reader, printer)5 *6 * Copyright IBM Corp. 2001, 20077 * Authors: Malcolm Beattie <beattiem@uk.ibm.com>8 * Michael Holzheu <holzheu@de.ibm.com>9 * Frank Munzert <munzert@de.ibm.com>10 */11 12#ifndef _VMUR_H_13#define _VMUR_H_14 15#include <linux/refcount.h>16#include <linux/workqueue.h>17 18#define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */19#define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */20/*21 * we only support z/VM's default unit record devices:22 * both in SPOOL directory control statement and in CP DEFINE statement23 * RDR defaults to 2540 reader24 * PUN defaults to 2540 punch25 * PRT defaults to 1403 printer26 */27#define READER_PUNCH_DEVTYPE 0x254028#define PRINTER_DEVTYPE 0x140329 30/* z/VM spool file control block SFBLOK */31struct file_control_block {32 char reserved_1[8];33 char user_owner[8];34 char user_orig[8];35 __s32 data_recs;36 __s16 rec_len;37 __s16 file_num;38 __u8 file_stat;39 __u8 dev_type;40 char reserved_2[6];41 char file_name[12];42 char file_type[12];43 char create_date[8];44 char create_time[8];45 char reserved_3[6];46 __u8 file_class;47 __u8 sfb_lok;48 __u64 distr_code;49 __u32 reserved_4;50 __u8 current_starting_copy_number;51 __u8 sfblock_cntrl_flags;52 __u8 reserved_5;53 __u8 more_status_flags;54 char rest[200];55} __attribute__ ((packed));56 57#define FLG_SYSTEM_HOLD 0x0458#define FLG_CP_DUMP 0x1059#define FLG_USER_HOLD 0x2060#define FLG_IN_USE 0x8061 62/*63 * A struct urdev is created for each ur device that is made available64 * via the ccw_device driver model.65 */66struct urdev {67 struct ccw_device *cdev; /* Backpointer to ccw device */68 struct mutex io_mutex; /* Serialises device IO */69 struct completion *io_done; /* do_ur_io waits; irq completes */70 struct device *device;71 struct cdev *char_device;72 struct ccw_dev_id dev_id; /* device id */73 size_t reclen; /* Record length for *write* CCWs */74 int class; /* VM device class */75 int io_request_rc; /* return code from I/O request */76 refcount_t ref_count; /* reference counter */77 wait_queue_head_t wait; /* wait queue to serialize open */78 int open_flag; /* "urdev is open" flag */79 spinlock_t open_lock; /* serialize critical sections */80 struct work_struct uevent_work; /* work to send uevent */81};82 83/*84 * A struct urfile is allocated at open() time for each device and85 * freed on release().86 */87struct urfile {88 struct urdev *urd;89 unsigned int flags;90 size_t dev_reclen;91 __u16 file_reclen;92};93 94/*95 * Device major/minor definitions.96 */97 98#define UR_MAJOR 0 /* get dynamic major */99/*100 * We map minor numbers directly to device numbers (0-FFFF) for simplicity.101 * This avoids having to allocate (and manage) slot numbers.102 */103#define NUM_MINORS 65536104 105/* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */106#define MAX_RECS_PER_IO 511107#define WRITE_CCW_CMD 0x01108 109#define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x)110#define CCWDEV_CU_DI(cutype, di) \111 CCW_DEVICE(cutype, 0x00), .driver_info = (di)112 113#define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */114 115#endif /* _VMUR_H_ */116