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113 lines
3.0 KiB
113 lines
3.0 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Linux driver for System z and s390 unit record devices |
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* (z/VM virtual punch, reader, printer) |
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* |
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* Copyright IBM Corp. 2001, 2007 |
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* Authors: Malcolm Beattie <[email protected]> |
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* Michael Holzheu <[email protected]> |
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* Frank Munzert <[email protected]> |
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*/ |
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#ifndef _VMUR_H_ |
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#define _VMUR_H_ |
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#include <linux/refcount.h> |
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#define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */ |
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#define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */ |
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/* |
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* we only support z/VM's default unit record devices: |
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* both in SPOOL directory control statement and in CP DEFINE statement |
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* RDR defaults to 2540 reader |
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* PUN defaults to 2540 punch |
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* PRT defaults to 1403 printer |
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*/ |
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#define READER_PUNCH_DEVTYPE 0x2540 |
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#define PRINTER_DEVTYPE 0x1403 |
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/* z/VM spool file control block SFBLOK */ |
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struct file_control_block { |
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char reserved_1[8]; |
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char user_owner[8]; |
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char user_orig[8]; |
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__s32 data_recs; |
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__s16 rec_len; |
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__s16 file_num; |
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__u8 file_stat; |
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__u8 dev_type; |
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char reserved_2[6]; |
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char file_name[12]; |
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char file_type[12]; |
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char create_date[8]; |
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char create_time[8]; |
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char reserved_3[6]; |
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__u8 file_class; |
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__u8 sfb_lok; |
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__u64 distr_code; |
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__u32 reserved_4; |
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__u8 current_starting_copy_number; |
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__u8 sfblock_cntrl_flags; |
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__u8 reserved_5; |
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__u8 more_status_flags; |
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char rest[200]; |
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} __attribute__ ((packed)); |
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#define FLG_SYSTEM_HOLD 0x04 |
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#define FLG_CP_DUMP 0x10 |
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#define FLG_USER_HOLD 0x20 |
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#define FLG_IN_USE 0x80 |
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/* |
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* A struct urdev is created for each ur device that is made available |
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* via the ccw_device driver model. |
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*/ |
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struct urdev { |
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struct ccw_device *cdev; /* Backpointer to ccw device */ |
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struct mutex io_mutex; /* Serialises device IO */ |
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struct completion *io_done; /* do_ur_io waits; irq completes */ |
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struct device *device; |
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struct cdev *char_device; |
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struct ccw_dev_id dev_id; /* device id */ |
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size_t reclen; /* Record length for *write* CCWs */ |
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int class; /* VM device class */ |
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int io_request_rc; /* return code from I/O request */ |
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refcount_t ref_count; /* reference counter */ |
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wait_queue_head_t wait; /* wait queue to serialize open */ |
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int open_flag; /* "urdev is open" flag */ |
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spinlock_t open_lock; /* serialize critical sections */ |
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}; |
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/* |
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* A struct urfile is allocated at open() time for each device and |
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* freed on release(). |
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*/ |
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struct urfile { |
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struct urdev *urd; |
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unsigned int flags; |
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size_t dev_reclen; |
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__u16 file_reclen; |
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}; |
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/* |
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* Device major/minor definitions. |
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*/ |
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#define UR_MAJOR 0 /* get dynamic major */ |
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/* |
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* We map minor numbers directly to device numbers (0-FFFF) for simplicity. |
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* This avoids having to allocate (and manage) slot numbers. |
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*/ |
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#define NUM_MINORS 65536 |
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/* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */ |
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#define MAX_RECS_PER_IO 511 |
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#define WRITE_CCW_CMD 0x01 |
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#define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x) |
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#define CCWDEV_CU_DI(cutype, di) \ |
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CCW_DEVICE(cutype, 0x00), .driver_info = (di) |
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#define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */ |
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#endif /* _VMUR_H_ */
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