1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | /* SPDX-License-Identifier: GPL-2.0 */ /* * 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_ #include <linux/refcount.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 */ refcount_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_ */ |