| /* |
| * 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_SYSTEM_HOLD 0x04 |
| #define FLG_CP_DUMP 0x10 |
| #define FLG_USER_HOLD 0x20 |
| #define FLG_IN_USE 0x80 |
| |
| /* |
| * 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 */ |
| atomic_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 */ |
| }; |
| |
| /* |
| * 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_ */ |