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1da177e4 LT |
1 | #ifndef S390_CIO_H |
2 | #define S390_CIO_H | |
3 | ||
6ab4879a | 4 | #include <linux/mutex.h> |
e5854a58 | 5 | #include <linux/device.h> |
7ad6a249 PO |
6 | #include <asm/chpid.h> |
7 | #include "chsc.h" | |
8 | #include "schid.h" | |
1da177e4 LT |
9 | |
10 | /* | |
11 | * path management control word | |
12 | */ | |
13 | struct pmcw { | |
cd6b4f27 CH |
14 | u32 intparm; /* interruption parameter */ |
15 | u32 qf : 1; /* qdio facility */ | |
16 | u32 res0 : 1; /* reserved zeros */ | |
17 | u32 isc : 3; /* interruption sublass */ | |
18 | u32 res5 : 3; /* reserved zeros */ | |
19 | u32 ena : 1; /* enabled */ | |
20 | u32 lm : 2; /* limit mode */ | |
21 | u32 mme : 2; /* measurement-mode enable */ | |
22 | u32 mp : 1; /* multipath mode */ | |
23 | u32 tf : 1; /* timing facility */ | |
24 | u32 dnv : 1; /* device number valid */ | |
25 | u32 dev : 16; /* device number */ | |
26 | u8 lpm; /* logical path mask */ | |
27 | u8 pnom; /* path not operational mask */ | |
28 | u8 lpum; /* last path used mask */ | |
29 | u8 pim; /* path installed mask */ | |
30 | u16 mbi; /* measurement-block index */ | |
31 | u8 pom; /* path operational mask */ | |
32 | u8 pam; /* path available mask */ | |
33 | u8 chpid[8]; /* CHPID 0-7 (if available) */ | |
34 | u32 unused1 : 8; /* reserved zeros */ | |
35 | u32 st : 3; /* subchannel type */ | |
36 | u32 unused2 : 18; /* reserved zeros */ | |
37 | u32 mbfc : 1; /* measurement block format control */ | |
38 | u32 xmwme : 1; /* extended measurement word mode enable */ | |
39 | u32 csense : 1; /* concurrent sense; can be enabled ...*/ | |
1da177e4 LT |
40 | /* ... per MSCH, however, if facility */ |
41 | /* ... is not installed, this results */ | |
42 | /* ... in an operand exception. */ | |
43 | } __attribute__ ((packed)); | |
44 | ||
45 | /* | |
46 | * subchannel information block | |
47 | */ | |
48 | struct schib { | |
49 | struct pmcw pmcw; /* path management control word */ | |
50 | struct scsw scsw; /* subchannel status word */ | |
51 | __u64 mba; /* measurement block address */ | |
52 | __u8 mda[4]; /* model dependent area */ | |
53 | } __attribute__ ((packed,aligned(4))); | |
54 | ||
1da177e4 LT |
55 | /* subchannel data structure used by I/O subroutines */ |
56 | struct subchannel { | |
a8237fc4 | 57 | struct subchannel_id schid; |
2ec22984 | 58 | spinlock_t *lock; /* subchannel lock */ |
6ab4879a | 59 | struct mutex reg_mutex; |
1da177e4 LT |
60 | enum { |
61 | SUBCHANNEL_TYPE_IO = 0, | |
62 | SUBCHANNEL_TYPE_CHSC = 1, | |
b279a4f5 | 63 | SUBCHANNEL_TYPE_MSG = 2, |
1da177e4 LT |
64 | SUBCHANNEL_TYPE_ADM = 3, |
65 | } st; /* subchannel type */ | |
66 | ||
67 | struct { | |
68 | unsigned int suspend:1; /* allow suspend */ | |
69 | unsigned int prefetch:1;/* deny prefetch */ | |
70 | unsigned int inter:1; /* suppress intermediate interrupts */ | |
71 | } __attribute__ ((packed)) options; | |
72 | ||
73 | __u8 vpm; /* verified path mask */ | |
74 | __u8 lpm; /* logical path mask */ | |
75 | __u8 opm; /* operational path mask */ | |
76 | struct schib schib; /* subchannel information block */ | |
edf22096 | 77 | int isc; /* desired interruption subclass */ |
7ad6a249 | 78 | struct chsc_ssd_info ssd_info; /* subchannel description */ |
1da177e4 LT |
79 | struct device dev; /* entry in device tree */ |
80 | struct css_driver *driver; | |
cd6b4f27 | 81 | void *private; /* private per subchannel type data */ |
1da177e4 LT |
82 | } __attribute__ ((aligned(8))); |
83 | ||
84 | #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ | |
85 | ||
86 | #define to_subchannel(n) container_of(n, struct subchannel, dev) | |
87 | ||
a8237fc4 | 88 | extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); |
edf22096 | 89 | extern int cio_enable_subchannel(struct subchannel *, u32); |
1da177e4 LT |
90 | extern int cio_disable_subchannel (struct subchannel *); |
91 | extern int cio_cancel (struct subchannel *); | |
92 | extern int cio_clear (struct subchannel *); | |
93 | extern int cio_resume (struct subchannel *); | |
94 | extern int cio_halt (struct subchannel *); | |
95 | extern int cio_start (struct subchannel *, struct ccw1 *, __u8); | |
96 | extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); | |
97 | extern int cio_cancel (struct subchannel *); | |
98 | extern int cio_set_options (struct subchannel *, int); | |
99 | extern int cio_get_options (struct subchannel *); | |
100 | extern int cio_modify (struct subchannel *); | |
a8237fc4 | 101 | |
d7b5a4c9 | 102 | int cio_create_sch_lock(struct subchannel *); |
4e8e56c6 | 103 | void do_adapter_IO(void); |
a806170e | 104 | void do_IRQ(struct pt_regs *); |
d7b5a4c9 | 105 | |
1da177e4 LT |
106 | /* Use with care. */ |
107 | #ifdef CONFIG_CCW_CONSOLE | |
108 | extern struct subchannel *cio_probe_console(void); | |
109 | extern void cio_release_console(void); | |
a8237fc4 | 110 | extern int cio_is_console(struct subchannel_id); |
1da177e4 | 111 | extern struct subchannel *cio_get_console_subchannel(void); |
2ec22984 | 112 | extern spinlock_t * cio_get_console_lock(void); |
cd6b4f27 | 113 | extern void *cio_get_console_priv(void); |
1da177e4 | 114 | #else |
a8237fc4 | 115 | #define cio_is_console(schid) 0 |
1da177e4 | 116 | #define cio_get_console_subchannel() NULL |
cd6b4f27 CH |
117 | #define cio_get_console_lock() NULL |
118 | #define cio_get_console_priv() NULL | |
1da177e4 LT |
119 | #endif |
120 | ||
1da177e4 | 121 | #endif |