1 #ifndef S390_CIO_H 2 #define S390_CIO_H 3 4 #include <linux/mutex.h> 5 #include <linux/device.h> 6 #include <linux/mod_devicetable.h> 7 #include <asm/chpid.h> 8 #include <asm/cio.h> 9 #include <asm/fcx.h> 10 #include <asm/schid.h> 11 #include "chsc.h" 12 13 /* 14 * path management control word 15 */ 16 struct pmcw { 17 u32 intparm; /* interruption parameter */ 18 u32 qf : 1; /* qdio facility */ 19 u32 w : 1; 20 u32 isc : 3; /* interruption sublass */ 21 u32 res5 : 3; /* reserved zeros */ 22 u32 ena : 1; /* enabled */ 23 u32 lm : 2; /* limit mode */ 24 u32 mme : 2; /* measurement-mode enable */ 25 u32 mp : 1; /* multipath mode */ 26 u32 tf : 1; /* timing facility */ 27 u32 dnv : 1; /* device number valid */ 28 u32 dev : 16; /* device number */ 29 u8 lpm; /* logical path mask */ 30 u8 pnom; /* path not operational mask */ 31 u8 lpum; /* last path used mask */ 32 u8 pim; /* path installed mask */ 33 u16 mbi; /* measurement-block index */ 34 u8 pom; /* path operational mask */ 35 u8 pam; /* path available mask */ 36 u8 chpid[8]; /* CHPID 0-7 (if available) */ 37 u32 unused1 : 8; /* reserved zeros */ 38 u32 st : 3; /* subchannel type */ 39 u32 unused2 : 18; /* reserved zeros */ 40 u32 mbfc : 1; /* measurement block format control */ 41 u32 xmwme : 1; /* extended measurement word mode enable */ 42 u32 csense : 1; /* concurrent sense; can be enabled ...*/ 43 /* ... per MSCH, however, if facility */ 44 /* ... is not installed, this results */ 45 /* ... in an operand exception. */ 46 } __attribute__ ((packed)); 47 48 /* Target SCHIB configuration. */ 49 struct schib_config { 50 u64 mba; 51 u32 intparm; 52 u16 mbi; 53 u32 isc:3; 54 u32 ena:1; 55 u32 mme:2; 56 u32 mp:1; 57 u32 csense:1; 58 u32 mbfc:1; 59 } __attribute__ ((packed)); 60 61 /* 62 * subchannel information block 63 */ 64 struct schib { 65 struct pmcw pmcw; /* path management control word */ 66 union scsw scsw; /* subchannel status word */ 67 __u64 mba; /* measurement block address */ 68 __u8 mda[4]; /* model dependent area */ 69 } __attribute__ ((packed,aligned(4))); 70 71 /* 72 * When rescheduled, todo's with higher values will overwrite those 73 * with lower values. 74 */ 75 enum sch_todo { 76 SCH_TODO_NOTHING, 77 SCH_TODO_EVAL, 78 SCH_TODO_UNREG, 79 }; 80 81 /* subchannel data structure used by I/O subroutines */ 82 struct subchannel { 83 struct subchannel_id schid; 84 spinlock_t *lock; /* subchannel lock */ 85 struct mutex reg_mutex; 86 enum { 87 SUBCHANNEL_TYPE_IO = 0, 88 SUBCHANNEL_TYPE_CHSC = 1, 89 SUBCHANNEL_TYPE_MSG = 2, 90 SUBCHANNEL_TYPE_ADM = 3, 91 } st; /* subchannel type */ 92 __u8 vpm; /* verified path mask */ 93 __u8 lpm; /* logical path mask */ 94 __u8 opm; /* operational path mask */ 95 struct schib schib; /* subchannel information block */ 96 int isc; /* desired interruption subclass */ 97 struct chsc_ssd_info ssd_info; /* subchannel description */ 98 struct device dev; /* entry in device tree */ 99 struct css_driver *driver; 100 enum sch_todo todo; 101 struct work_struct todo_work; 102 struct schib_config config; 103 } __attribute__ ((aligned(8))); 104 105 DECLARE_PER_CPU(struct irb, cio_irb); 106 107 #define to_subchannel(n) container_of(n, struct subchannel, dev) 108 109 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); 110 extern int cio_enable_subchannel(struct subchannel *, u32); 111 extern int cio_disable_subchannel (struct subchannel *); 112 extern int cio_cancel (struct subchannel *); 113 extern int cio_clear (struct subchannel *); 114 extern int cio_resume (struct subchannel *); 115 extern int cio_halt (struct subchannel *); 116 extern int cio_start (struct subchannel *, struct ccw1 *, __u8); 117 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); 118 extern int cio_cancel (struct subchannel *); 119 extern int cio_set_options (struct subchannel *, int); 120 extern int cio_update_schib(struct subchannel *sch); 121 extern int cio_commit_config(struct subchannel *sch); 122 123 int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); 124 int cio_tm_intrg(struct subchannel *sch); 125 126 /* Use with care. */ 127 #ifdef CONFIG_CCW_CONSOLE 128 extern struct subchannel *cio_probe_console(void); 129 extern int cio_is_console(struct subchannel_id); 130 extern void cio_register_early_subchannels(void); 131 extern void cio_tsch(struct subchannel *sch); 132 #else 133 #define cio_is_console(schid) 0 134 static inline void cio_register_early_subchannels(void) {} 135 #endif 136 137 #endif 138