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 #include <linux/refcount.h> 15 16 #define DEV_CLASS_UR_I 0x20 /* diag210 unit record input device class */ 17 #define DEV_CLASS_UR_O 0x10 /* diag210 unit record output device class */ 18 /* 19 * we only support z/VM's default unit record devices: 20 * both in SPOOL directory control statement and in CP DEFINE statement 21 * RDR defaults to 2540 reader 22 * PUN defaults to 2540 punch 23 * PRT defaults to 1403 printer 24 */ 25 #define READER_PUNCH_DEVTYPE 0x2540 26 #define PRINTER_DEVTYPE 0x1403 27 28 /* z/VM spool file control block SFBLOK */ 29 struct file_control_block { 30 char reserved_1[8]; 31 char user_owner[8]; 32 char user_orig[8]; 33 __s32 data_recs; 34 __s16 rec_len; 35 __s16 file_num; 36 __u8 file_stat; 37 __u8 dev_type; 38 char reserved_2[6]; 39 char file_name[12]; 40 char file_type[12]; 41 char create_date[8]; 42 char create_time[8]; 43 char reserved_3[6]; 44 __u8 file_class; 45 __u8 sfb_lok; 46 __u64 distr_code; 47 __u32 reserved_4; 48 __u8 current_starting_copy_number; 49 __u8 sfblock_cntrl_flags; 50 __u8 reserved_5; 51 __u8 more_status_flags; 52 char rest[200]; 53 } __attribute__ ((packed)); 54 55 #define FLG_SYSTEM_HOLD 0x04 56 #define FLG_CP_DUMP 0x10 57 #define FLG_USER_HOLD 0x20 58 #define FLG_IN_USE 0x80 59 60 /* 61 * A struct urdev is created for each ur device that is made available 62 * via the ccw_device driver model. 63 */ 64 struct urdev { 65 struct ccw_device *cdev; /* Backpointer to ccw device */ 66 struct mutex io_mutex; /* Serialises device IO */ 67 struct completion *io_done; /* do_ur_io waits; irq completes */ 68 struct device *device; 69 struct cdev *char_device; 70 struct ccw_dev_id dev_id; /* device id */ 71 size_t reclen; /* Record length for *write* CCWs */ 72 int class; /* VM device class */ 73 int io_request_rc; /* return code from I/O request */ 74 refcount_t ref_count; /* reference counter */ 75 wait_queue_head_t wait; /* wait queue to serialize open */ 76 int open_flag; /* "urdev is open" flag */ 77 spinlock_t open_lock; /* serialize critical sections */ 78 }; 79 80 /* 81 * A struct urfile is allocated at open() time for each device and 82 * freed on release(). 83 */ 84 struct urfile { 85 struct urdev *urd; 86 unsigned int flags; 87 size_t dev_reclen; 88 __u16 file_reclen; 89 }; 90 91 /* 92 * Device major/minor definitions. 93 */ 94 95 #define UR_MAJOR 0 /* get dynamic major */ 96 /* 97 * We map minor numbers directly to device numbers (0-FFFF) for simplicity. 98 * This avoids having to allocate (and manage) slot numbers. 99 */ 100 #define NUM_MINORS 65536 101 102 /* Limiting each I/O to 511 records limits chan prog to 4KB (511 r/w + 1 NOP) */ 103 #define MAX_RECS_PER_IO 511 104 #define WRITE_CCW_CMD 0x01 105 106 #define TRACE(x...) debug_sprintf_event(vmur_dbf, 1, x) 107 #define CCWDEV_CU_DI(cutype, di) \ 108 CCW_DEVICE(cutype, 0x00), .driver_info = (di) 109 110 #define FILE_RECLEN_OFFSET 4064 /* reclen offset in spool data block */ 111 112 #endif /* _VMUR_H_ */ 113