1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Linux driver for System z and s390 unit record devices 4 * (z/VM virtual punch, reader, printer) 5 * 6 * Copyright IBM Corp. 2001, 2007 7 * 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 #define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */ 16 #define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */ 17 /* 18 * we only support z/VM's default unit record devices: 19 * both in SPOOL directory control statement and in CP DEFINE statement 20 * RDR defaults to 2540 reader 21 * PUN defaults to 2540 punch 22 * PRT defaults to 1403 printer 23 */ 24 #define READER_PUNCH_DEVTYPE 0x2540 25 #define PRINTER_DEVTYPE 0x1403 26 27 /* z/VM spool file control block SFBLOK */ 28 struct file_control_block { 29 char reserved_1[8]; 30 char user_owner[8]; 31 char user_orig[8]; 32 __s32 data_recs; 33 __s16 rec_len; 34 __s16 file_num; 35 __u8 file_stat; 36 __u8 dev_type; 37 char reserved_2[6]; 38 char file_name[12]; 39 char file_type[12]; 40 char create_date[8]; 41 char create_time[8]; 42 char reserved_3[6]; 43 __u8 file_class; 44 __u8 sfb_lok; 45 __u64 distr_code; 46 __u32 reserved_4; 47 __u8 current_starting_copy_number; 48 __u8 sfblock_cntrl_flags; 49 __u8 reserved_5; 50 __u8 more_status_flags; 51 char rest[200]; 52 } __attribute__ ((packed)); 53 54 #define FLG_SYSTEM_HOLD 0x04 55 #define FLG_CP_DUMP 0x10 56 #define FLG_USER_HOLD 0x20 57 #define FLG_IN_USE 0x80 58 59 /* 60 * A struct urdev is created for each ur device that is made available 61 * via the ccw_device driver model. 62 */ 63 struct urdev { 64 struct ccw_device *cdev; /* Backpointer to ccw device */ 65 struct mutex io_mutex; /* Serialises device IO */ 66 struct completion *io_done; /* do_ur_io waits; irq completes */ 67 struct device *device; 68 struct cdev *char_device; 69 struct ccw_dev_id dev_id; /* device id */ 70 size_t reclen; /* Record length for *write* CCWs */ 71 int class; /* VM device class */ 72 int io_request_rc; /* return code from I/O request */ 73 atomic_t ref_count; /* reference counter */ 74 wait_queue_head_t wait; /* wait queue to serialize open */ 75 int open_flag; /* "urdev is open" flag */ 76 spinlock_t open_lock; /* serialize critical sections */ 77 }; 78 79 /* 80 * A struct urfile is allocated at open() time for each device and 81 * freed on release(). 82 */ 83 struct urfile { 84 struct urdev *urd; 85 unsigned int flags; 86 size_t dev_reclen; 87 __u16 file_reclen; 88 }; 89 90 /* 91 * Device major/minor definitions. 92 */ 93 94 #define UR_MAJOR 0 /* get dynamic major */ 95 /* 96 * We map minor numbers directly to device numbers (0-FFFF) for simplicity. 97 * This avoids having to allocate (and manage) slot numbers. 98 */ 99 #define NUM_MINORS 65536 100 101 /* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */ 102 #define MAX_RECS_PER_IO 511 103 #define WRITE_CCW_CMD 0x01 104 105 #define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x) 106 #define CCWDEV_CU_DI(cutype, di) \ 107 CCW_DEVICE(cutype, 0x00), .driver_info = (di) 108 109 #define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */ 110 111 #endif /* _VMUR_H_ */ 112