Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | #ifndef S390_CIO_H |
| 2 | #define S390_CIO_H |
| 3 | |
| 4 | /* |
| 5 | * where we put the ssd info |
| 6 | */ |
| 7 | struct ssd_info { |
| 8 | __u8 valid:1; |
| 9 | __u8 type:7; /* subchannel type */ |
| 10 | __u8 chpid[8]; /* chpids */ |
| 11 | __u16 fla[8]; /* full link addresses */ |
| 12 | } __attribute__ ((packed)); |
| 13 | |
| 14 | /* |
| 15 | * path management control word |
| 16 | */ |
| 17 | struct pmcw { |
| 18 | __u32 intparm; /* interruption parameter */ |
| 19 | __u32 qf : 1; /* qdio facility */ |
| 20 | __u32 res0 : 1; /* reserved zeros */ |
| 21 | __u32 isc : 3; /* interruption sublass */ |
| 22 | __u32 res5 : 3; /* reserved zeros */ |
| 23 | __u32 ena : 1; /* enabled */ |
| 24 | __u32 lm : 2; /* limit mode */ |
| 25 | __u32 mme : 2; /* measurement-mode enable */ |
| 26 | __u32 mp : 1; /* multipath mode */ |
| 27 | __u32 tf : 1; /* timing facility */ |
| 28 | __u32 dnv : 1; /* device number valid */ |
| 29 | __u32 dev : 16; /* device number */ |
| 30 | __u8 lpm; /* logical path mask */ |
| 31 | __u8 pnom; /* path not operational mask */ |
| 32 | __u8 lpum; /* last path used mask */ |
| 33 | __u8 pim; /* path installed mask */ |
| 34 | __u16 mbi; /* measurement-block index */ |
| 35 | __u8 pom; /* path operational mask */ |
| 36 | __u8 pam; /* path available mask */ |
| 37 | __u8 chpid[8]; /* CHPID 0-7 (if available) */ |
| 38 | __u32 unused1 : 8; /* reserved zeros */ |
| 39 | __u32 st : 3; /* subchannel type */ |
| 40 | __u32 unused2 : 18; /* reserved zeros */ |
| 41 | __u32 mbfc : 1; /* measurement block format control */ |
| 42 | __u32 xmwme : 1; /* extended measurement word mode enable */ |
| 43 | __u32 csense : 1; /* concurrent sense; can be enabled ...*/ |
| 44 | /* ... per MSCH, however, if facility */ |
| 45 | /* ... is not installed, this results */ |
| 46 | /* ... in an operand exception. */ |
| 47 | } __attribute__ ((packed)); |
| 48 | |
| 49 | /* |
| 50 | * subchannel information block |
| 51 | */ |
| 52 | struct schib { |
| 53 | struct pmcw pmcw; /* path management control word */ |
| 54 | struct scsw scsw; /* subchannel status word */ |
| 55 | __u64 mba; /* measurement block address */ |
| 56 | __u8 mda[4]; /* model dependent area */ |
| 57 | } __attribute__ ((packed,aligned(4))); |
| 58 | |
| 59 | /* |
| 60 | * operation request block |
| 61 | */ |
| 62 | struct orb { |
| 63 | __u32 intparm; /* interruption parameter */ |
| 64 | __u32 key : 4; /* flags, like key, suspend control, etc. */ |
| 65 | __u32 spnd : 1; /* suspend control */ |
| 66 | __u32 res1 : 1; /* reserved */ |
| 67 | __u32 mod : 1; /* modification control */ |
| 68 | __u32 sync : 1; /* synchronize control */ |
| 69 | __u32 fmt : 1; /* format control */ |
| 70 | __u32 pfch : 1; /* prefetch control */ |
| 71 | __u32 isic : 1; /* initial-status-interruption control */ |
| 72 | __u32 alcc : 1; /* address-limit-checking control */ |
| 73 | __u32 ssic : 1; /* suppress-suspended-interr. control */ |
| 74 | __u32 res2 : 1; /* reserved */ |
| 75 | __u32 c64 : 1; /* IDAW/QDIO 64 bit control */ |
| 76 | __u32 i2k : 1; /* IDAW 2/4kB block size control */ |
| 77 | __u32 lpm : 8; /* logical path mask */ |
| 78 | __u32 ils : 1; /* incorrect length */ |
| 79 | __u32 zero : 6; /* reserved zeros */ |
| 80 | __u32 orbx : 1; /* ORB extension control */ |
| 81 | __u32 cpa; /* channel program address */ |
| 82 | } __attribute__ ((packed,aligned(4))); |
| 83 | |
| 84 | /* subchannel data structure used by I/O subroutines */ |
| 85 | struct subchannel { |
| 86 | unsigned int irq; /* aka. subchannel number */ |
| 87 | spinlock_t lock; /* subchannel lock */ |
| 88 | |
| 89 | enum { |
| 90 | SUBCHANNEL_TYPE_IO = 0, |
| 91 | SUBCHANNEL_TYPE_CHSC = 1, |
| 92 | SUBCHANNEL_TYPE_MESSAGE = 2, |
| 93 | SUBCHANNEL_TYPE_ADM = 3, |
| 94 | } st; /* subchannel type */ |
| 95 | |
| 96 | struct { |
| 97 | unsigned int suspend:1; /* allow suspend */ |
| 98 | unsigned int prefetch:1;/* deny prefetch */ |
| 99 | unsigned int inter:1; /* suppress intermediate interrupts */ |
| 100 | } __attribute__ ((packed)) options; |
| 101 | |
| 102 | __u8 vpm; /* verified path mask */ |
| 103 | __u8 lpm; /* logical path mask */ |
| 104 | __u8 opm; /* operational path mask */ |
| 105 | struct schib schib; /* subchannel information block */ |
| 106 | struct orb orb; /* operation request block */ |
| 107 | struct ccw1 sense_ccw; /* static ccw for sense command */ |
| 108 | struct ssd_info ssd_info; /* subchannel description */ |
| 109 | struct device dev; /* entry in device tree */ |
| 110 | struct css_driver *driver; |
| 111 | } __attribute__ ((aligned(8))); |
| 112 | |
| 113 | #define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ |
| 114 | |
| 115 | #define to_subchannel(n) container_of(n, struct subchannel, dev) |
| 116 | |
| 117 | extern int cio_validate_subchannel (struct subchannel *, unsigned int); |
| 118 | extern int cio_enable_subchannel (struct subchannel *, unsigned int); |
| 119 | extern int cio_disable_subchannel (struct subchannel *); |
| 120 | extern int cio_cancel (struct subchannel *); |
| 121 | extern int cio_clear (struct subchannel *); |
| 122 | extern int cio_resume (struct subchannel *); |
| 123 | extern int cio_halt (struct subchannel *); |
| 124 | extern int cio_start (struct subchannel *, struct ccw1 *, __u8); |
| 125 | extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); |
| 126 | extern int cio_cancel (struct subchannel *); |
| 127 | extern int cio_set_options (struct subchannel *, int); |
| 128 | extern int cio_get_options (struct subchannel *); |
| 129 | extern int cio_modify (struct subchannel *); |
| 130 | /* Use with care. */ |
| 131 | #ifdef CONFIG_CCW_CONSOLE |
| 132 | extern struct subchannel *cio_probe_console(void); |
| 133 | extern void cio_release_console(void); |
| 134 | extern int cio_is_console(int irq); |
| 135 | extern struct subchannel *cio_get_console_subchannel(void); |
| 136 | #else |
| 137 | #define cio_is_console(irq) 0 |
| 138 | #define cio_get_console_subchannel() NULL |
| 139 | #endif |
| 140 | |
| 141 | extern int cio_show_msg; |
| 142 | |
| 143 | #endif |