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 /* I/O-Interruption Code as stored by TEST PENDING INTERRUPTION (TPI). */ 49 struct tpi_info { 50 struct subchannel_id schid; 51 u32 intparm; 52 u32 adapter_IO:1; 53 u32 :1; 54 u32 isc:3; 55 u32 :27; 56 u32 type:3; 57 u32 :12; 58 } __packed __aligned(4); 59 60 /* Target SCHIB configuration. */ 61 struct schib_config { 62 u64 mba; 63 u32 intparm; 64 u16 mbi; 65 u32 isc:3; 66 u32 ena:1; 67 u32 mme:2; 68 u32 mp:1; 69 u32 csense:1; 70 u32 mbfc:1; 71 } __attribute__ ((packed)); 72 73 /* 74 * subchannel information block 75 */ 76 struct schib { 77 struct pmcw pmcw; /* path management control word */ 78 union scsw scsw; /* subchannel status word */ 79 __u64 mba; /* measurement block address */ 80 __u8 mda[4]; /* model dependent area */ 81 } __attribute__ ((packed,aligned(4))); 82 83 /* 84 * When rescheduled, todo's with higher values will overwrite those 85 * with lower values. 86 */ 87 enum sch_todo { 88 SCH_TODO_NOTHING, 89 SCH_TODO_EVAL, 90 SCH_TODO_UNREG, 91 }; 92 93 /* subchannel data structure used by I/O subroutines */ 94 struct subchannel { 95 struct subchannel_id schid; 96 spinlock_t *lock; /* subchannel lock */ 97 struct mutex reg_mutex; 98 enum { 99 SUBCHANNEL_TYPE_IO = 0, 100 SUBCHANNEL_TYPE_CHSC = 1, 101 SUBCHANNEL_TYPE_MSG = 2, 102 SUBCHANNEL_TYPE_ADM = 3, 103 } st; /* subchannel type */ 104 __u8 vpm; /* verified path mask */ 105 __u8 lpm; /* logical path mask */ 106 __u8 opm; /* operational path mask */ 107 struct schib schib; /* subchannel information block */ 108 int isc; /* desired interruption subclass */ 109 struct chsc_ssd_info ssd_info; /* subchannel description */ 110 struct device dev; /* entry in device tree */ 111 struct css_driver *driver; 112 enum sch_todo todo; 113 struct work_struct todo_work; 114 struct schib_config config; 115 } __attribute__ ((aligned(8))); 116 117 DECLARE_PER_CPU(struct irb, cio_irb); 118 119 #define to_subchannel(n) container_of(n, struct subchannel, dev) 120 121 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); 122 extern int cio_enable_subchannel(struct subchannel *, u32); 123 extern int cio_disable_subchannel (struct subchannel *); 124 extern int cio_cancel (struct subchannel *); 125 extern int cio_clear (struct subchannel *); 126 extern int cio_resume (struct subchannel *); 127 extern int cio_halt (struct subchannel *); 128 extern int cio_start (struct subchannel *, struct ccw1 *, __u8); 129 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); 130 extern int cio_cancel (struct subchannel *); 131 extern int cio_set_options (struct subchannel *, int); 132 extern int cio_update_schib(struct subchannel *sch); 133 extern int cio_commit_config(struct subchannel *sch); 134 135 int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); 136 int cio_tm_intrg(struct subchannel *sch); 137 138 /* Use with care. */ 139 #ifdef CONFIG_CCW_CONSOLE 140 extern struct subchannel *cio_probe_console(void); 141 extern int cio_is_console(struct subchannel_id); 142 extern void cio_register_early_subchannels(void); 143 extern void cio_tsch(struct subchannel *sch); 144 #else 145 #define cio_is_console(schid) 0 146 static inline void cio_register_early_subchannels(void) {} 147 #endif 148 149 #endif 150