1 #ifndef S390_CIO_H 2 #define S390_CIO_H 3 4 #include "schid.h" 5 #include <linux/mutex.h> 6 7 /* 8 * where we put the ssd info 9 */ 10 struct ssd_info { 11 __u8 valid:1; 12 __u8 type:7; /* subchannel type */ 13 __u8 chpid[8]; /* chpids */ 14 __u16 fla[8]; /* full link addresses */ 15 } __attribute__ ((packed)); 16 17 /* 18 * path management control word 19 */ 20 struct pmcw { 21 __u32 intparm; /* interruption parameter */ 22 __u32 qf : 1; /* qdio facility */ 23 __u32 res0 : 1; /* reserved zeros */ 24 __u32 isc : 3; /* interruption sublass */ 25 __u32 res5 : 3; /* reserved zeros */ 26 __u32 ena : 1; /* enabled */ 27 __u32 lm : 2; /* limit mode */ 28 __u32 mme : 2; /* measurement-mode enable */ 29 __u32 mp : 1; /* multipath mode */ 30 __u32 tf : 1; /* timing facility */ 31 __u32 dnv : 1; /* device number valid */ 32 __u32 dev : 16; /* device number */ 33 __u8 lpm; /* logical path mask */ 34 __u8 pnom; /* path not operational mask */ 35 __u8 lpum; /* last path used mask */ 36 __u8 pim; /* path installed mask */ 37 __u16 mbi; /* measurement-block index */ 38 __u8 pom; /* path operational mask */ 39 __u8 pam; /* path available mask */ 40 __u8 chpid[8]; /* CHPID 0-7 (if available) */ 41 __u32 unused1 : 8; /* reserved zeros */ 42 __u32 st : 3; /* subchannel type */ 43 __u32 unused2 : 18; /* reserved zeros */ 44 __u32 mbfc : 1; /* measurement block format control */ 45 __u32 xmwme : 1; /* extended measurement word mode enable */ 46 __u32 csense : 1; /* concurrent sense; can be enabled ...*/ 47 /* ... per MSCH, however, if facility */ 48 /* ... is not installed, this results */ 49 /* ... in an operand exception. */ 50 } __attribute__ ((packed)); 51 52 /* 53 * subchannel information block 54 */ 55 struct schib { 56 struct pmcw pmcw; /* path management control word */ 57 struct scsw scsw; /* subchannel status word */ 58 __u64 mba; /* measurement block address */ 59 __u8 mda[4]; /* model dependent area */ 60 } __attribute__ ((packed,aligned(4))); 61 62 /* 63 * operation request block 64 */ 65 struct orb { 66 __u32 intparm; /* interruption parameter */ 67 __u32 key : 4; /* flags, like key, suspend control, etc. */ 68 __u32 spnd : 1; /* suspend control */ 69 __u32 res1 : 1; /* reserved */ 70 __u32 mod : 1; /* modification control */ 71 __u32 sync : 1; /* synchronize control */ 72 __u32 fmt : 1; /* format control */ 73 __u32 pfch : 1; /* prefetch control */ 74 __u32 isic : 1; /* initial-status-interruption control */ 75 __u32 alcc : 1; /* address-limit-checking control */ 76 __u32 ssic : 1; /* suppress-suspended-interr. control */ 77 __u32 res2 : 1; /* reserved */ 78 __u32 c64 : 1; /* IDAW/QDIO 64 bit control */ 79 __u32 i2k : 1; /* IDAW 2/4kB block size control */ 80 __u32 lpm : 8; /* logical path mask */ 81 __u32 ils : 1; /* incorrect length */ 82 __u32 zero : 6; /* reserved zeros */ 83 __u32 orbx : 1; /* ORB extension control */ 84 __u32 cpa; /* channel program address */ 85 } __attribute__ ((packed,aligned(4))); 86 87 /* subchannel data structure used by I/O subroutines */ 88 struct subchannel { 89 struct subchannel_id schid; 90 spinlock_t lock; /* subchannel lock */ 91 struct mutex reg_mutex; 92 enum { 93 SUBCHANNEL_TYPE_IO = 0, 94 SUBCHANNEL_TYPE_CHSC = 1, 95 SUBCHANNEL_TYPE_MESSAGE = 2, 96 SUBCHANNEL_TYPE_ADM = 3, 97 } st; /* subchannel type */ 98 99 struct { 100 unsigned int suspend:1; /* allow suspend */ 101 unsigned int prefetch:1;/* deny prefetch */ 102 unsigned int inter:1; /* suppress intermediate interrupts */ 103 } __attribute__ ((packed)) options; 104 105 __u8 vpm; /* verified path mask */ 106 __u8 lpm; /* logical path mask */ 107 __u8 opm; /* operational path mask */ 108 struct schib schib; /* subchannel information block */ 109 struct orb orb; /* operation request block */ 110 struct ccw1 sense_ccw; /* static ccw for sense command */ 111 struct ssd_info ssd_info; /* subchannel description */ 112 struct device dev; /* entry in device tree */ 113 struct css_driver *driver; 114 } __attribute__ ((aligned(8))); 115 116 #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ 117 118 #define to_subchannel(n) container_of(n, struct subchannel, dev) 119 120 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); 121 extern int cio_enable_subchannel (struct subchannel *, unsigned int); 122 extern int cio_disable_subchannel (struct subchannel *); 123 extern int cio_cancel (struct subchannel *); 124 extern int cio_clear (struct subchannel *); 125 extern int cio_resume (struct subchannel *); 126 extern int cio_halt (struct subchannel *); 127 extern int cio_start (struct subchannel *, struct ccw1 *, __u8); 128 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); 129 extern int cio_cancel (struct subchannel *); 130 extern int cio_set_options (struct subchannel *, int); 131 extern int cio_get_options (struct subchannel *); 132 extern int cio_modify (struct subchannel *); 133 134 /* Use with care. */ 135 #ifdef CONFIG_CCW_CONSOLE 136 extern struct subchannel *cio_probe_console(void); 137 extern void cio_release_console(void); 138 extern int cio_is_console(struct subchannel_id); 139 extern struct subchannel *cio_get_console_subchannel(void); 140 #else 141 #define cio_is_console(schid) 0 142 #define cio_get_console_subchannel() NULL 143 #endif 144 145 extern int cio_show_msg; 146 147 #endif 148