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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> |
7e9db9ea | 6 | #include <linux/mod_devicetable.h> |
7ad6a249 | 7 | #include <asm/chpid.h> |
83262d63 PO |
8 | #include <asm/cio.h> |
9 | #include <asm/fcx.h> | |
9d92a7e1 | 10 | #include <asm/schid.h> |
7ad6a249 | 11 | #include "chsc.h" |
1da177e4 LT |
12 | |
13 | /* | |
14 | * path management control word | |
15 | */ | |
16 | struct pmcw { | |
cd6b4f27 CH |
17 | u32 intparm; /* interruption parameter */ |
18 | u32 qf : 1; /* qdio facility */ | |
b3a686f4 | 19 | u32 w : 1; |
cd6b4f27 CH |
20 | u32 isc : 3; /* interruption sublass */ |
21 | u32 res5 : 3; /* reserved zeros */ | |
22 | u32 ena : 1; /* enabled */ | |
23 | u32 lm : 2; /* limit mode */ | |
24 | u32 mme : 2; /* measurement-mode enable */ | |
25 | u32 mp : 1; /* multipath mode */ | |
26 | u32 tf : 1; /* timing facility */ | |
27 | u32 dnv : 1; /* device number valid */ | |
28 | u32 dev : 16; /* device number */ | |
29 | u8 lpm; /* logical path mask */ | |
30 | u8 pnom; /* path not operational mask */ | |
31 | u8 lpum; /* last path used mask */ | |
32 | u8 pim; /* path installed mask */ | |
33 | u16 mbi; /* measurement-block index */ | |
34 | u8 pom; /* path operational mask */ | |
35 | u8 pam; /* path available mask */ | |
36 | u8 chpid[8]; /* CHPID 0-7 (if available) */ | |
37 | u32 unused1 : 8; /* reserved zeros */ | |
38 | u32 st : 3; /* subchannel type */ | |
39 | u32 unused2 : 18; /* reserved zeros */ | |
40 | u32 mbfc : 1; /* measurement block format control */ | |
41 | u32 xmwme : 1; /* extended measurement word mode enable */ | |
42 | u32 csense : 1; /* concurrent sense; can be enabled ...*/ | |
1da177e4 LT |
43 | /* ... per MSCH, however, if facility */ |
44 | /* ... is not installed, this results */ | |
45 | /* ... in an operand exception. */ | |
46 | } __attribute__ ((packed)); | |
47 | ||
13952ec1 SO |
48 | /* Target SCHIB configuration. */ |
49 | struct schib_config { | |
50 | u64 mba; | |
51 | u32 intparm; | |
52 | u16 mbi; | |
53 | u32 isc:3; | |
54 | u32 ena:1; | |
55 | u32 mme:2; | |
56 | u32 mp:1; | |
57 | u32 csense:1; | |
58 | u32 mbfc:1; | |
59 | } __attribute__ ((packed)); | |
60 | ||
1da177e4 LT |
61 | /* |
62 | * subchannel information block | |
63 | */ | |
64 | struct schib { | |
65 | struct pmcw pmcw; /* path management control word */ | |
23d805b6 | 66 | union scsw scsw; /* subchannel status word */ |
1da177e4 LT |
67 | __u64 mba; /* measurement block address */ |
68 | __u8 mda[4]; /* model dependent area */ | |
69 | } __attribute__ ((packed,aligned(4))); | |
70 | ||
390935ac PO |
71 | enum sch_todo { |
72 | SCH_TODO_NOTHING, | |
73 | SCH_TODO_UNREG, | |
74 | }; | |
75 | ||
1da177e4 LT |
76 | /* subchannel data structure used by I/O subroutines */ |
77 | struct subchannel { | |
a8237fc4 | 78 | struct subchannel_id schid; |
2ec22984 | 79 | spinlock_t *lock; /* subchannel lock */ |
6ab4879a | 80 | struct mutex reg_mutex; |
1da177e4 LT |
81 | enum { |
82 | SUBCHANNEL_TYPE_IO = 0, | |
83 | SUBCHANNEL_TYPE_CHSC = 1, | |
b279a4f5 | 84 | SUBCHANNEL_TYPE_MSG = 2, |
1da177e4 LT |
85 | SUBCHANNEL_TYPE_ADM = 3, |
86 | } st; /* subchannel type */ | |
87 | ||
88 | struct { | |
89 | unsigned int suspend:1; /* allow suspend */ | |
90 | unsigned int prefetch:1;/* deny prefetch */ | |
91 | unsigned int inter:1; /* suppress intermediate interrupts */ | |
92 | } __attribute__ ((packed)) options; | |
93 | ||
94 | __u8 vpm; /* verified path mask */ | |
95 | __u8 lpm; /* logical path mask */ | |
96 | __u8 opm; /* operational path mask */ | |
97 | struct schib schib; /* subchannel information block */ | |
edf22096 | 98 | int isc; /* desired interruption subclass */ |
7ad6a249 | 99 | struct chsc_ssd_info ssd_info; /* subchannel description */ |
1da177e4 LT |
100 | struct device dev; /* entry in device tree */ |
101 | struct css_driver *driver; | |
cd6b4f27 | 102 | void *private; /* private per subchannel type data */ |
390935ac PO |
103 | enum sch_todo todo; |
104 | struct work_struct todo_work; | |
13952ec1 | 105 | struct schib_config config; |
1da177e4 LT |
106 | } __attribute__ ((aligned(8))); |
107 | ||
108 | #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ | |
109 | ||
110 | #define to_subchannel(n) container_of(n, struct subchannel, dev) | |
111 | ||
a8237fc4 | 112 | extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); |
edf22096 | 113 | extern int cio_enable_subchannel(struct subchannel *, u32); |
1da177e4 LT |
114 | extern int cio_disable_subchannel (struct subchannel *); |
115 | extern int cio_cancel (struct subchannel *); | |
116 | extern int cio_clear (struct subchannel *); | |
117 | extern int cio_resume (struct subchannel *); | |
118 | extern int cio_halt (struct subchannel *); | |
119 | extern int cio_start (struct subchannel *, struct ccw1 *, __u8); | |
120 | extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); | |
121 | extern int cio_cancel (struct subchannel *); | |
122 | extern int cio_set_options (struct subchannel *, int); | |
123 | extern int cio_get_options (struct subchannel *); | |
cdb912a4 | 124 | extern int cio_update_schib(struct subchannel *sch); |
13952ec1 | 125 | extern int cio_commit_config(struct subchannel *sch); |
a8237fc4 | 126 | |
83262d63 PO |
127 | int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); |
128 | int cio_tm_intrg(struct subchannel *sch); | |
129 | ||
d7b5a4c9 | 130 | int cio_create_sch_lock(struct subchannel *); |
da7c5af8 | 131 | void do_adapter_IO(u8 isc); |
a806170e | 132 | void do_IRQ(struct pt_regs *); |
d7b5a4c9 | 133 | |
1da177e4 LT |
134 | /* Use with care. */ |
135 | #ifdef CONFIG_CCW_CONSOLE | |
136 | extern struct subchannel *cio_probe_console(void); | |
137 | extern void cio_release_console(void); | |
a8237fc4 | 138 | extern int cio_is_console(struct subchannel_id); |
1da177e4 | 139 | extern struct subchannel *cio_get_console_subchannel(void); |
2ec22984 | 140 | extern spinlock_t * cio_get_console_lock(void); |
cd6b4f27 | 141 | extern void *cio_get_console_priv(void); |
1da177e4 | 142 | #else |
a8237fc4 | 143 | #define cio_is_console(schid) 0 |
1da177e4 | 144 | #define cio_get_console_subchannel() NULL |
cd6b4f27 CH |
145 | #define cio_get_console_lock() NULL |
146 | #define cio_get_console_priv() NULL | |
1da177e4 LT |
147 | #endif |
148 | ||
1da177e4 | 149 | #endif |