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 /* 56 * operation request block 57 */ 58 struct orb { 59 __u32 intparm; /* interruption parameter */ 60 __u32 key : 4; /* flags, like key, suspend control, etc. */ 61 __u32 spnd : 1; /* suspend control */ 62 __u32 res1 : 1; /* reserved */ 63 __u32 mod : 1; /* modification control */ 64 __u32 sync : 1; /* synchronize control */ 65 __u32 fmt : 1; /* format control */ 66 __u32 pfch : 1; /* prefetch control */ 67 __u32 isic : 1; /* initial-status-interruption control */ 68 __u32 alcc : 1; /* address-limit-checking control */ 69 __u32 ssic : 1; /* suppress-suspended-interr. control */ 70 __u32 res2 : 1; /* reserved */ 71 __u32 c64 : 1; /* IDAW/QDIO 64 bit control */ 72 __u32 i2k : 1; /* IDAW 2/4kB block size control */ 73 __u32 lpm : 8; /* logical path mask */ 74 __u32 ils : 1; /* incorrect length */ 75 __u32 zero : 6; /* reserved zeros */ 76 __u32 orbx : 1; /* ORB extension control */ 77 __u32 cpa; /* channel program address */ 78 } __attribute__ ((packed,aligned(4))); 79 80 /* subchannel data structure used by I/O subroutines */ 81 struct subchannel { 82 struct subchannel_id schid; 83 spinlock_t *lock; /* subchannel lock */ 84 struct mutex reg_mutex; 85 enum { 86 SUBCHANNEL_TYPE_IO = 0, 87 SUBCHANNEL_TYPE_CHSC = 1, 88 SUBCHANNEL_TYPE_MESSAGE = 2, 89 SUBCHANNEL_TYPE_ADM = 3, 90 } st; /* subchannel type */ 91 92 struct { 93 unsigned int suspend:1; /* allow suspend */ 94 unsigned int prefetch:1;/* deny prefetch */ 95 unsigned int inter:1; /* suppress intermediate interrupts */ 96 } __attribute__ ((packed)) options; 97 98 __u8 vpm; /* verified path mask */ 99 __u8 lpm; /* logical path mask */ 100 __u8 opm; /* operational path mask */ 101 struct schib schib; /* subchannel information block */ 102 struct orb orb; /* operation request block */ 103 struct ccw1 sense_ccw; /* static ccw for sense command */ 104 struct chsc_ssd_info ssd_info; /* subchannel description */ 105 struct device dev; /* entry in device tree */ 106 struct css_driver *driver; 107 } __attribute__ ((aligned(8))); 108 109 #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ 110 111 #define to_subchannel(n) container_of(n, struct subchannel, dev) 112 113 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); 114 extern int cio_enable_subchannel (struct subchannel *, unsigned int); 115 extern int cio_disable_subchannel (struct subchannel *); 116 extern int cio_cancel (struct subchannel *); 117 extern int cio_clear (struct subchannel *); 118 extern int cio_resume (struct subchannel *); 119 extern int cio_halt (struct subchannel *); 120 extern int cio_start (struct subchannel *, struct ccw1 *, __u8); 121 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); 122 extern int cio_cancel (struct subchannel *); 123 extern int cio_set_options (struct subchannel *, int); 124 extern int cio_get_options (struct subchannel *); 125 extern int cio_modify (struct subchannel *); 126 127 int cio_create_sch_lock(struct subchannel *); 128 129 /* Use with care. */ 130 #ifdef CONFIG_CCW_CONSOLE 131 extern struct subchannel *cio_probe_console(void); 132 extern void cio_release_console(void); 133 extern int cio_is_console(struct subchannel_id); 134 extern struct subchannel *cio_get_console_subchannel(void); 135 extern spinlock_t * cio_get_console_lock(void); 136 #else 137 #define cio_is_console(schid) 0 138 #define cio_get_console_subchannel() NULL 139 #define cio_get_console_lock() NULL; 140 #endif 141 142 extern int cio_show_msg; 143 144 #endif 145