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