1 #ifndef S390_CIO_H
2 #define S390_CIO_H
3
4 #include <linux/mutex.h>
5 #include <linux/device.h>
6 #include <asm/chpid.h>
7 #include "chsc.h"
8 #include "schid.h"
9
10 /*
11 * path management control word
12 */
13 struct pmcw {
14 u32 intparm; /* interruption parameter */
15 u32 qf : 1; /* qdio facility */
16 u32 res0 : 1; /* reserved zeros */
17 u32 isc : 3; /* interruption sublass */
18 u32 res5 : 3; /* reserved zeros */
19 u32 ena : 1; /* enabled */
20 u32 lm : 2; /* limit mode */
21 u32 mme : 2; /* measurement-mode enable */
22 u32 mp : 1; /* multipath mode */
23 u32 tf : 1; /* timing facility */
24 u32 dnv : 1; /* device number valid */
25 u32 dev : 16; /* device number */
26 u8 lpm; /* logical path mask */
27 u8 pnom; /* path not operational mask */
28 u8 lpum; /* last path used mask */
29 u8 pim; /* path installed mask */
30 u16 mbi; /* measurement-block index */
31 u8 pom; /* path operational mask */
32 u8 pam; /* path available mask */
33 u8 chpid[8]; /* CHPID 0-7 (if available) */
34 u32 unused1 : 8; /* reserved zeros */
35 u32 st : 3; /* subchannel type */
36 u32 unused2 : 18; /* reserved zeros */
37 u32 mbfc : 1; /* measurement block format control */
38 u32 xmwme : 1; /* extended measurement word mode enable */
39 u32 csense : 1; /* concurrent sense; can be enabled ...*/
40 /* ... per MSCH, however, if facility */
41 /* ... is not installed, this results */
42 /* ... in an operand exception. */
43 } __attribute__ ((packed));
44
45 /*
46 * subchannel information block
47 */
48 struct schib {
49 struct pmcw pmcw; /* path management control word */
50 struct scsw scsw; /* subchannel status word */
51 __u64 mba; /* measurement block address */
52 __u8 mda[4]; /* model dependent area */
53 } __attribute__ ((packed,aligned(4)));
54
55 /* subchannel data structure used by I/O subroutines */
56 struct subchannel {
57 struct subchannel_id schid;
58 spinlock_t *lock; /* subchannel lock */
59 struct mutex reg_mutex;
60 enum {
61 SUBCHANNEL_TYPE_IO = 0,
62 SUBCHANNEL_TYPE_CHSC = 1,
63 SUBCHANNEL_TYPE_MSG = 2,
64 SUBCHANNEL_TYPE_ADM = 3,
65 } st; /* subchannel type */
66
67 struct {
68 unsigned int suspend:1; /* allow suspend */
69 unsigned int prefetch:1;/* deny prefetch */
70 unsigned int inter:1; /* suppress intermediate interrupts */
71 } __attribute__ ((packed)) options;
72
73 __u8 vpm; /* verified path mask */
74 __u8 lpm; /* logical path mask */
75 __u8 opm; /* operational path mask */
76 struct schib schib; /* subchannel information block */
77 struct chsc_ssd_info ssd_info; /* subchannel description */
78 struct device dev; /* entry in device tree */
79 struct css_driver *driver;
80 void *private; /* private per subchannel type data */
81 } __attribute__ ((aligned(8)));
82
83 #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
84
85 #define to_subchannel(n) container_of(n, struct subchannel, dev)
86
87 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
88 extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32);
89 extern int cio_disable_subchannel (struct subchannel *);
90 extern int cio_cancel (struct subchannel *);
91 extern int cio_clear (struct subchannel *);
92 extern int cio_resume (struct subchannel *);
93 extern int cio_halt (struct subchannel *);
94 extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
95 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
96 extern int cio_cancel (struct subchannel *);
97 extern int cio_set_options (struct subchannel *, int);
98 extern int cio_get_options (struct subchannel *);
99 extern int cio_modify (struct subchannel *);
100
101 int cio_create_sch_lock(struct subchannel *);
102 void do_adapter_IO(void);
103
104 /* Use with care. */
105 #ifdef CONFIG_CCW_CONSOLE
106 extern struct subchannel *cio_probe_console(void);
107 extern void cio_release_console(void);
108 extern int cio_is_console(struct subchannel_id);
109 extern struct subchannel *cio_get_console_subchannel(void);
110 extern spinlock_t * cio_get_console_lock(void);
111 extern void *cio_get_console_priv(void);
112 #else
113 #define cio_is_console(schid) 0
114 #define cio_get_console_subchannel() NULL
115 #define cio_get_console_lock() NULL
116 #define cio_get_console_priv() NULL
117 #endif
118
119 extern int cio_show_msg;
120
121 #endif
122
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