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[S390] cio: replace subchannel evaluation queue with bitmap
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / cio / cio.h
CommitLineData
1da177e4
LT		 1#ifndef S390_CIO_H
2#define S390_CIO_H
3
a8237fc4 4#include "schid.h"
6ab4879a 5#include <linux/mutex.h>
e5854a58 6#include <linux/device.h>
a8237fc4 7
1da177e4
LT		 8/*
9 * where we put the ssd info
10 */
11struct ssd_info {
12 __u8 valid:1;
13 __u8 type:7; /* subchannel type */
14 __u8 chpid[8]; /* chpids */
15 __u16 fla[8]; /* full link addresses */
16} __attribute__ ((packed));
17
18/*
19 * path management control word
20 */
21struct pmcw {
22 __u32 intparm; /* interruption parameter */
23 __u32 qf : 1; /* qdio facility */
24 __u32 res0 : 1; /* reserved zeros */
25 __u32 isc : 3; /* interruption sublass */
26 __u32 res5 : 3; /* reserved zeros */
27 __u32 ena : 1; /* enabled */
28 __u32 lm : 2; /* limit mode */
29 __u32 mme : 2; /* measurement-mode enable */
30 __u32 mp : 1; /* multipath mode */
31 __u32 tf : 1; /* timing facility */
32 __u32 dnv : 1; /* device number valid */
33 __u32 dev : 16; /* device number */
34 __u8 lpm; /* logical path mask */
35 __u8 pnom; /* path not operational mask */
36 __u8 lpum; /* last path used mask */
37 __u8 pim; /* path installed mask */
38 __u16 mbi; /* measurement-block index */
39 __u8 pom; /* path operational mask */
40 __u8 pam; /* path available mask */
41 __u8 chpid[8]; /* CHPID 0-7 (if available) */
42 __u32 unused1 : 8; /* reserved zeros */
43 __u32 st : 3; /* subchannel type */
44 __u32 unused2 : 18; /* reserved zeros */
45 __u32 mbfc : 1; /* measurement block format control */
46 __u32 xmwme : 1; /* extended measurement word mode enable */
47 __u32 csense : 1; /* concurrent sense; can be enabled ...*/
48 /* ... per MSCH, however, if facility */
49 /* ... is not installed, this results */
50 /* ... in an operand exception. */
51} __attribute__ ((packed));
52
53/*
54 * subchannel information block
55 */
56struct schib {
57 struct pmcw pmcw; /* path management control word */
58 struct scsw scsw; /* subchannel status word */
59 __u64 mba; /* measurement block address */
60 __u8 mda[4]; /* model dependent area */
61} __attribute__ ((packed,aligned(4)));
62
63/*
64 * operation request block
65 */
66struct orb {
67 __u32 intparm; /* interruption parameter */
68 __u32 key : 4; /* flags, like key, suspend control, etc. */
69 __u32 spnd : 1; /* suspend control */
70 __u32 res1 : 1; /* reserved */
71 __u32 mod : 1; /* modification control */
72 __u32 sync : 1; /* synchronize control */
73 __u32 fmt : 1; /* format control */
74 __u32 pfch : 1; /* prefetch control */
75 __u32 isic : 1; /* initial-status-interruption control */
76 __u32 alcc : 1; /* address-limit-checking control */
77 __u32 ssic : 1; /* suppress-suspended-interr. control */
78 __u32 res2 : 1; /* reserved */
79 __u32 c64 : 1; /* IDAW/QDIO 64 bit control */
80 __u32 i2k : 1; /* IDAW 2/4kB block size control */
81 __u32 lpm : 8; /* logical path mask */
82 __u32 ils : 1; /* incorrect length */
83 __u32 zero : 6; /* reserved zeros */
84 __u32 orbx : 1; /* ORB extension control */
85 __u32 cpa; /* channel program address */
86} __attribute__ ((packed,aligned(4)));
87
88/* subchannel data structure used by I/O subroutines */
89struct subchannel {
a8237fc4 90 struct subchannel_id schid;
2ec22984 91 spinlock_t *lock; /* subchannel lock */
6ab4879a 92 struct mutex reg_mutex;
1da177e4
LT		 93 enum {
94 SUBCHANNEL_TYPE_IO = 0,
95 SUBCHANNEL_TYPE_CHSC = 1,
96 SUBCHANNEL_TYPE_MESSAGE = 2,
97 SUBCHANNEL_TYPE_ADM = 3,
98 } st; /* subchannel type */
99
100 struct {
101 unsigned int suspend:1; /* allow suspend */
102 unsigned int prefetch:1;/* deny prefetch */
103 unsigned int inter:1; /* suppress intermediate interrupts */
104 } __attribute__ ((packed)) options;
105
106 __u8 vpm; /* verified path mask */
107 __u8 lpm; /* logical path mask */
108 __u8 opm; /* operational path mask */
109 struct schib schib; /* subchannel information block */
110 struct orb orb; /* operation request block */
111 struct ccw1 sense_ccw; /* static ccw for sense command */
112 struct ssd_info ssd_info; /* subchannel description */
113 struct device dev; /* entry in device tree */
114 struct css_driver *driver;
115} __attribute__ ((aligned(8)));
116
117#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
118
119#define to_subchannel(n) container_of(n, struct subchannel, dev)
120
a8237fc4 121extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
1da177e4
LT		 122extern int cio_enable_subchannel (struct subchannel *, unsigned int);
123extern int cio_disable_subchannel (struct subchannel *);
124extern int cio_cancel (struct subchannel *);
125extern int cio_clear (struct subchannel *);
126extern int cio_resume (struct subchannel *);
127extern int cio_halt (struct subchannel *);
128extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
129extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
130extern int cio_cancel (struct subchannel *);
131extern int cio_set_options (struct subchannel *, int);
132extern int cio_get_options (struct subchannel *);
133extern int cio_modify (struct subchannel *);
a8237fc4 134
d7b5a4c9
CH		 135int cio_create_sch_lock(struct subchannel *);
136
1da177e4
LT		 137/* Use with care. */
138#ifdef CONFIG_CCW_CONSOLE
139extern struct subchannel *cio_probe_console(void);
140extern void cio_release_console(void);
a8237fc4 141extern int cio_is_console(struct subchannel_id);
1da177e4 142extern struct subchannel *cio_get_console_subchannel(void);
2ec22984 143extern spinlock_t * cio_get_console_lock(void);
1da177e4 144#else
a8237fc4 145#define cio_is_console(schid) 0
1da177e4 146#define cio_get_console_subchannel() NULL
2ec22984 147#define cio_get_console_lock() NULL;
1da177e4
LT		 148#endif
149
150extern int cio_show_msg;
151
152#endif
kernel source for telekom puls (alcatel/mediatek)