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1da177e4 LT |
1 | #ifndef S390_CIO_H |
2 | #define S390_CIO_H | |
3 | ||
a8237fc4 CH |
4 | #include "schid.h" |
5 | ||
1da177e4 LT |
6 | /* |
7 | * where we put the ssd info | |
8 | */ | |
9 | struct ssd_info { | |
10 | __u8 valid:1; | |
11 | __u8 type:7; /* subchannel type */ | |
12 | __u8 chpid[8]; /* chpids */ | |
13 | __u16 fla[8]; /* full link addresses */ | |
14 | } __attribute__ ((packed)); | |
15 | ||
16 | /* | |
17 | * path management control word | |
18 | */ | |
19 | struct pmcw { | |
20 | __u32 intparm; /* interruption parameter */ | |
21 | __u32 qf : 1; /* qdio facility */ | |
22 | __u32 res0 : 1; /* reserved zeros */ | |
23 | __u32 isc : 3; /* interruption sublass */ | |
24 | __u32 res5 : 3; /* reserved zeros */ | |
25 | __u32 ena : 1; /* enabled */ | |
26 | __u32 lm : 2; /* limit mode */ | |
27 | __u32 mme : 2; /* measurement-mode enable */ | |
28 | __u32 mp : 1; /* multipath mode */ | |
29 | __u32 tf : 1; /* timing facility */ | |
30 | __u32 dnv : 1; /* device number valid */ | |
31 | __u32 dev : 16; /* device number */ | |
32 | __u8 lpm; /* logical path mask */ | |
33 | __u8 pnom; /* path not operational mask */ | |
34 | __u8 lpum; /* last path used mask */ | |
35 | __u8 pim; /* path installed mask */ | |
36 | __u16 mbi; /* measurement-block index */ | |
37 | __u8 pom; /* path operational mask */ | |
38 | __u8 pam; /* path available mask */ | |
39 | __u8 chpid[8]; /* CHPID 0-7 (if available) */ | |
40 | __u32 unused1 : 8; /* reserved zeros */ | |
41 | __u32 st : 3; /* subchannel type */ | |
42 | __u32 unused2 : 18; /* reserved zeros */ | |
43 | __u32 mbfc : 1; /* measurement block format control */ | |
44 | __u32 xmwme : 1; /* extended measurement word mode enable */ | |
45 | __u32 csense : 1; /* concurrent sense; can be enabled ...*/ | |
46 | /* ... per MSCH, however, if facility */ | |
47 | /* ... is not installed, this results */ | |
48 | /* ... in an operand exception. */ | |
49 | } __attribute__ ((packed)); | |
50 | ||
51 | /* | |
52 | * subchannel information block | |
53 | */ | |
54 | struct schib { | |
55 | struct pmcw pmcw; /* path management control word */ | |
56 | struct scsw scsw; /* subchannel status word */ | |
57 | __u64 mba; /* measurement block address */ | |
58 | __u8 mda[4]; /* model dependent area */ | |
59 | } __attribute__ ((packed,aligned(4))); | |
60 | ||
61 | /* | |
62 | * operation request block | |
63 | */ | |
64 | struct orb { | |
65 | __u32 intparm; /* interruption parameter */ | |
66 | __u32 key : 4; /* flags, like key, suspend control, etc. */ | |
67 | __u32 spnd : 1; /* suspend control */ | |
68 | __u32 res1 : 1; /* reserved */ | |
69 | __u32 mod : 1; /* modification control */ | |
70 | __u32 sync : 1; /* synchronize control */ | |
71 | __u32 fmt : 1; /* format control */ | |
72 | __u32 pfch : 1; /* prefetch control */ | |
73 | __u32 isic : 1; /* initial-status-interruption control */ | |
74 | __u32 alcc : 1; /* address-limit-checking control */ | |
75 | __u32 ssic : 1; /* suppress-suspended-interr. control */ | |
76 | __u32 res2 : 1; /* reserved */ | |
77 | __u32 c64 : 1; /* IDAW/QDIO 64 bit control */ | |
78 | __u32 i2k : 1; /* IDAW 2/4kB block size control */ | |
79 | __u32 lpm : 8; /* logical path mask */ | |
80 | __u32 ils : 1; /* incorrect length */ | |
81 | __u32 zero : 6; /* reserved zeros */ | |
82 | __u32 orbx : 1; /* ORB extension control */ | |
83 | __u32 cpa; /* channel program address */ | |
84 | } __attribute__ ((packed,aligned(4))); | |
85 | ||
86 | /* subchannel data structure used by I/O subroutines */ | |
87 | struct subchannel { | |
a8237fc4 | 88 | struct subchannel_id schid; |
1da177e4 LT |
89 | spinlock_t lock; /* subchannel lock */ |
90 | ||
91 | enum { | |
92 | SUBCHANNEL_TYPE_IO = 0, | |
93 | SUBCHANNEL_TYPE_CHSC = 1, | |
94 | SUBCHANNEL_TYPE_MESSAGE = 2, | |
95 | SUBCHANNEL_TYPE_ADM = 3, | |
96 | } st; /* subchannel type */ | |
97 | ||
98 | struct { | |
99 | unsigned int suspend:1; /* allow suspend */ | |
100 | unsigned int prefetch:1;/* deny prefetch */ | |
101 | unsigned int inter:1; /* suppress intermediate interrupts */ | |
102 | } __attribute__ ((packed)) options; | |
103 | ||
104 | __u8 vpm; /* verified path mask */ | |
105 | __u8 lpm; /* logical path mask */ | |
106 | __u8 opm; /* operational path mask */ | |
107 | struct schib schib; /* subchannel information block */ | |
108 | struct orb orb; /* operation request block */ | |
109 | struct ccw1 sense_ccw; /* static ccw for sense command */ | |
110 | struct ssd_info ssd_info; /* subchannel description */ | |
111 | struct device dev; /* entry in device tree */ | |
112 | struct css_driver *driver; | |
113 | } __attribute__ ((aligned(8))); | |
114 | ||
115 | #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ | |
116 | ||
117 | #define to_subchannel(n) container_of(n, struct subchannel, dev) | |
118 | ||
a8237fc4 | 119 | extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); |
1da177e4 LT |
120 | extern int cio_enable_subchannel (struct subchannel *, unsigned int); |
121 | extern int cio_disable_subchannel (struct subchannel *); | |
122 | extern int cio_cancel (struct subchannel *); | |
123 | extern int cio_clear (struct subchannel *); | |
124 | extern int cio_resume (struct subchannel *); | |
125 | extern int cio_halt (struct subchannel *); | |
126 | extern int cio_start (struct subchannel *, struct ccw1 *, __u8); | |
127 | extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); | |
128 | extern int cio_cancel (struct subchannel *); | |
129 | extern int cio_set_options (struct subchannel *, int); | |
130 | extern int cio_get_options (struct subchannel *); | |
131 | extern int cio_modify (struct subchannel *); | |
a8237fc4 | 132 | |
1da177e4 LT |
133 | /* Use with care. */ |
134 | #ifdef CONFIG_CCW_CONSOLE | |
135 | extern struct subchannel *cio_probe_console(void); | |
136 | extern void cio_release_console(void); | |
a8237fc4 | 137 | extern int cio_is_console(struct subchannel_id); |
1da177e4 LT |
138 | extern struct subchannel *cio_get_console_subchannel(void); |
139 | #else | |
a8237fc4 | 140 | #define cio_is_console(schid) 0 |
1da177e4 LT |
141 | #define cio_get_console_subchannel() NULL |
142 | #endif | |
143 | ||
144 | extern int cio_show_msg; | |
145 | ||
146 | #endif |