1 /* 2 * Linux driver for System z and s390 unit record devices 3 * (z/VM virtual punch, reader, printer) 4 * 5 * Copyright IBM Corp. 2001, 2007 6 * Authors: Malcolm Beattie <beattiem@uk.ibm.com> 7 * Michael Holzheu <holzheu@de.ibm.com> 8 * Frank Munzert <munzert@de.ibm.com> 9 */ 10 11 #ifndef _VMUR_H_ 12 #define _VMUR_H_ 13 14 #define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */ 15 #define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */ 16 /* 17 * we only support z/VM's default unit record devices: 18 * both in SPOOL directory control statement and in CP DEFINE statement 19 * RDR defaults to 2540 reader 20 * PUN defaults to 2540 punch 21 * PRT defaults to 1403 printer 22 */ 23 #define READER_PUNCH_DEVTYPE 0x2540 24 #define PRINTER_DEVTYPE 0x1403 25 26 /* z/VM spool file control block SFBLOK */ 27 struct file_control_block { 28 char reserved_1[8]; 29 char user_owner[8]; 30 char user_orig[8]; 31 __s32 data_recs; 32 __s16 rec_len; 33 __s16 file_num; 34 __u8 file_stat; 35 __u8 dev_type; 36 char reserved_2[6]; 37 char file_name[12]; 38 char file_type[12]; 39 char create_date[8]; 40 char create_time[8]; 41 char reserved_3[6]; 42 __u8 file_class; 43 __u8 sfb_lok; 44 __u64 distr_code; 45 __u32 reserved_4; 46 __u8 current_starting_copy_number; 47 __u8 sfblock_cntrl_flags; 48 __u8 reserved_5; 49 __u8 more_status_flags; 50 char rest[200]; 51 } __attribute__ ((packed)); 52 53 #define FLG_SYSTEM_HOLD 0x04 54 #define FLG_CP_DUMP 0x10 55 #define FLG_USER_HOLD 0x20 56 #define FLG_IN_USE 0x80 57 58 /* 59 * A struct urdev is created for each ur device that is made available 60 * via the ccw_device driver model. 61 */ 62 struct urdev { 63 struct ccw_device *cdev; /* Backpointer to ccw device */ 64 struct mutex io_mutex; /* Serialises device IO */ 65 struct completion *io_done; /* do_ur_io waits; irq completes */ 66 struct device *device; 67 struct cdev *char_device; 68 struct ccw_dev_id dev_id; /* device id */ 69 size_t reclen; /* Record length for *write* CCWs */ 70 int class; /* VM device class */ 71 int io_request_rc; /* return code from I/O request */ 72 atomic_t ref_count; /* reference counter */ 73 wait_queue_head_t wait; /* wait queue to serialize open */ 74 int open_flag; /* "urdev is open" flag */ 75 spinlock_t open_lock; /* serialize critical sections */ 76 }; 77 78 /* 79 * A struct urfile is allocated at open() time for each device and 80 * freed on release(). 81 */ 82 struct urfile { 83 struct urdev *urd; 84 unsigned int flags; 85 size_t dev_reclen; 86 __u16 file_reclen; 87 }; 88 89 /* 90 * Device major/minor definitions. 91 */ 92 93 #define UR_MAJOR 0 /* get dynamic major */ 94 /* 95 * We map minor numbers directly to device numbers (0-FFFF) for simplicity. 96 * This avoids having to allocate (and manage) slot numbers. 97 */ 98 #define NUM_MINORS 65536 99 100 /* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */ 101 #define MAX_RECS_PER_IO 511 102 #define WRITE_CCW_CMD 0x01 103 104 #define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x) 105 #define CCWDEV_CU_DI(cutype, di) \ 106 CCW_DEVICE(cutype, 0x00), .driver_info = (di) 107 108 #define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */ 109 110 #endif /* _VMUR_H_ */ 111