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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
810cb5b3 FM |
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 | ||
f2405598 MH |
54 | #define FLG_SYSTEM_HOLD 0x04 |
55 | #define FLG_CP_DUMP 0x10 | |
56 | #define FLG_USER_HOLD 0x20 | |
4eac3452 | 57 | #define FLG_IN_USE 0x80 |
810cb5b3 FM |
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 */ | |
810cb5b3 FM |
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 */ | |
8127a1f8 | 73 | atomic_t ref_count; /* reference counter */ |
a695f167 FM |
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 */ | |
810cb5b3 FM |
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_ */ |