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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef S390_CIO_H
2#define S390_CIO_H
3
Cornelia Hucka8237fc2006-01-06 00:19:21 -08004#include "schid.h"
5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006/*
7 * where we put the ssd info
8 */
9struct 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 */
19struct 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 */
54struct 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 */
64struct 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 */
87struct subchannel {
Cornelia Hucka8237fc2006-01-06 00:19:21 -080088 struct subchannel_id schid;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089 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
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800119extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120extern int cio_enable_subchannel (struct subchannel *, unsigned int);
121extern int cio_disable_subchannel (struct subchannel *);
122extern int cio_cancel (struct subchannel *);
123extern int cio_clear (struct subchannel *);
124extern int cio_resume (struct subchannel *);
125extern int cio_halt (struct subchannel *);
126extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
127extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
128extern int cio_cancel (struct subchannel *);
129extern int cio_set_options (struct subchannel *, int);
130extern int cio_get_options (struct subchannel *);
131extern int cio_modify (struct subchannel *);
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133/* Use with care. */
134#ifdef CONFIG_CCW_CONSOLE
135extern struct subchannel *cio_probe_console(void);
136extern void cio_release_console(void);
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800137extern int cio_is_console(struct subchannel_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138extern struct subchannel *cio_get_console_subchannel(void);
139#else
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800140#define cio_is_console(schid) 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141#define cio_get_console_subchannel() NULL
142#endif
143
144extern int cio_show_msg;
145
146#endif