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