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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | #ifndef S390_CIO_H |
3 | #define S390_CIO_H | |
4 | ||
6ab4879a | 5 | #include <linux/mutex.h> |
e5854a58 | 6 | #include <linux/device.h> |
7e9db9ea | 7 | #include <linux/mod_devicetable.h> |
7ad6a249 | 8 | #include <asm/chpid.h> |
83262d63 PO |
9 | #include <asm/cio.h> |
10 | #include <asm/fcx.h> | |
9d92a7e1 | 11 | #include <asm/schid.h> |
7ad6a249 | 12 | #include "chsc.h" |
1da177e4 LT |
13 | |
14 | /* | |
15 | * path management control word | |
16 | */ | |
17 | struct pmcw { | |
cd6b4f27 CH |
18 | u32 intparm; /* interruption parameter */ |
19 | u32 qf : 1; /* qdio facility */ | |
b3a686f4 | 20 | u32 w : 1; |
cd6b4f27 CH |
21 | u32 isc : 3; /* interruption sublass */ |
22 | u32 res5 : 3; /* reserved zeros */ | |
23 | u32 ena : 1; /* enabled */ | |
24 | u32 lm : 2; /* limit mode */ | |
25 | u32 mme : 2; /* measurement-mode enable */ | |
26 | u32 mp : 1; /* multipath mode */ | |
27 | u32 tf : 1; /* timing facility */ | |
28 | u32 dnv : 1; /* device number valid */ | |
29 | u32 dev : 16; /* device number */ | |
30 | u8 lpm; /* logical path mask */ | |
31 | u8 pnom; /* path not operational mask */ | |
32 | u8 lpum; /* last path used mask */ | |
33 | u8 pim; /* path installed mask */ | |
34 | u16 mbi; /* measurement-block index */ | |
35 | u8 pom; /* path operational mask */ | |
36 | u8 pam; /* path available mask */ | |
37 | u8 chpid[8]; /* CHPID 0-7 (if available) */ | |
38 | u32 unused1 : 8; /* reserved zeros */ | |
39 | u32 st : 3; /* subchannel type */ | |
40 | u32 unused2 : 18; /* reserved zeros */ | |
41 | u32 mbfc : 1; /* measurement block format control */ | |
42 | u32 xmwme : 1; /* extended measurement word mode enable */ | |
43 | u32 csense : 1; /* concurrent sense; can be enabled ...*/ | |
1da177e4 LT |
44 | /* ... per MSCH, however, if facility */ |
45 | /* ... is not installed, this results */ | |
46 | /* ... in an operand exception. */ | |
47 | } __attribute__ ((packed)); | |
48 | ||
2ab59de7 PO |
49 | /* I/O-Interruption Code as stored by TEST PENDING INTERRUPTION (TPI). */ |
50 | struct tpi_info { | |
51 | struct subchannel_id schid; | |
52 | u32 intparm; | |
53 | u32 adapter_IO:1; | |
30e63ef2 | 54 | u32 directed_irq:1; |
2ab59de7 PO |
55 | u32 isc:3; |
56 | u32 :27; | |
57 | u32 type:3; | |
58 | u32 :12; | |
59 | } __packed __aligned(4); | |
60 | ||
13952ec1 SO |
61 | /* Target SCHIB configuration. */ |
62 | struct schib_config { | |
63 | u64 mba; | |
64 | u32 intparm; | |
65 | u16 mbi; | |
66 | u32 isc:3; | |
67 | u32 ena:1; | |
68 | u32 mme:2; | |
69 | u32 mp:1; | |
70 | u32 csense:1; | |
71 | u32 mbfc:1; | |
72 | } __attribute__ ((packed)); | |
73 | ||
1da177e4 LT |
74 | /* |
75 | * subchannel information block | |
76 | */ | |
77 | struct schib { | |
78 | struct pmcw pmcw; /* path management control word */ | |
23d805b6 | 79 | union scsw scsw; /* subchannel status word */ |
1da177e4 LT |
80 | __u64 mba; /* measurement block address */ |
81 | __u8 mda[4]; /* model dependent area */ | |
82 | } __attribute__ ((packed,aligned(4))); | |
83 | ||
817e5000 SO |
84 | /* |
85 | * When rescheduled, todo's with higher values will overwrite those | |
86 | * with lower values. | |
87 | */ | |
390935ac PO |
88 | enum sch_todo { |
89 | SCH_TODO_NOTHING, | |
817e5000 | 90 | SCH_TODO_EVAL, |
390935ac PO |
91 | SCH_TODO_UNREG, |
92 | }; | |
93 | ||
1da177e4 LT |
94 | /* subchannel data structure used by I/O subroutines */ |
95 | struct subchannel { | |
a8237fc4 | 96 | struct subchannel_id schid; |
2ec22984 | 97 | spinlock_t *lock; /* subchannel lock */ |
6ab4879a | 98 | struct mutex reg_mutex; |
1da177e4 LT |
99 | enum { |
100 | SUBCHANNEL_TYPE_IO = 0, | |
101 | SUBCHANNEL_TYPE_CHSC = 1, | |
b279a4f5 | 102 | SUBCHANNEL_TYPE_MSG = 2, |
1da177e4 LT |
103 | SUBCHANNEL_TYPE_ADM = 3, |
104 | } st; /* subchannel type */ | |
1da177e4 LT |
105 | __u8 vpm; /* verified path mask */ |
106 | __u8 lpm; /* logical path mask */ | |
107 | __u8 opm; /* operational path mask */ | |
108 | struct schib schib; /* subchannel information block */ | |
edf22096 | 109 | int isc; /* desired interruption subclass */ |
7ad6a249 | 110 | struct chsc_ssd_info ssd_info; /* subchannel description */ |
1da177e4 LT |
111 | struct device dev; /* entry in device tree */ |
112 | struct css_driver *driver; | |
390935ac PO |
113 | enum sch_todo todo; |
114 | struct work_struct todo_work; | |
13952ec1 | 115 | struct schib_config config; |
05668e1d | 116 | u64 dma_mask; |
ebc3d179 | 117 | char *driver_override; /* Driver name to force a match */ |
1da177e4 LT |
118 | } __attribute__ ((aligned(8))); |
119 | ||
e91012ee | 120 | DECLARE_PER_CPU_ALIGNED(struct irb, cio_irb); |
63aef00b | 121 | |
1da177e4 LT |
122 | #define to_subchannel(n) container_of(n, struct subchannel, dev) |
123 | ||
edf22096 | 124 | extern int cio_enable_subchannel(struct subchannel *, u32); |
1da177e4 LT |
125 | extern int cio_disable_subchannel (struct subchannel *); |
126 | extern int cio_cancel (struct subchannel *); | |
127 | extern int cio_clear (struct subchannel *); | |
5434da4d | 128 | extern int cio_cancel_halt_clear(struct subchannel *, int *); |
1da177e4 LT |
129 | extern int cio_resume (struct subchannel *); |
130 | extern int cio_halt (struct subchannel *); | |
131 | extern int cio_start (struct subchannel *, struct ccw1 *, __u8); | |
132 | extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); | |
1da177e4 | 133 | extern int cio_set_options (struct subchannel *, int); |
cdb912a4 | 134 | extern int cio_update_schib(struct subchannel *sch); |
13952ec1 | 135 | extern int cio_commit_config(struct subchannel *sch); |
a8237fc4 | 136 | |
83262d63 PO |
137 | int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); |
138 | int cio_tm_intrg(struct subchannel *sch); | |
139 | ||
b50623e5 HP |
140 | extern int __init airq_init(void); |
141 | ||
1da177e4 LT |
142 | /* Use with care. */ |
143 | #ifdef CONFIG_CCW_CONSOLE | |
144 | extern struct subchannel *cio_probe_console(void); | |
a8237fc4 | 145 | extern int cio_is_console(struct subchannel_id); |
14556b33 | 146 | extern void cio_register_early_subchannels(void); |
188561a4 | 147 | extern void cio_tsch(struct subchannel *sch); |
1da177e4 | 148 | #else |
a8237fc4 | 149 | #define cio_is_console(schid) 0 |
14556b33 | 150 | static inline void cio_register_early_subchannels(void) {} |
1da177e4 LT |
151 | #endif |
152 | ||
1da177e4 | 153 | #endif |