| | 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_set_options (struct subchannel *, int); |
| | 131 | extern int cio_update_schib(struct subchannel *sch); |
| | 132 | extern int cio_commit_config(struct subchannel *sch); |
| | 133 | |
| | 134 | int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); |
| | 135 | int cio_tm_intrg(struct subchannel *sch); |
| | 136 | |
| | 137 | /* Use with care. */ |
| | 138 | #ifdef CONFIG_CCW_CONSOLE |
| | 139 | extern struct subchannel *cio_probe_console(void); |
| | 140 | extern int cio_is_console(struct subchannel_id); |
| | 141 | extern void cio_register_early_subchannels(void); |
| | 142 | extern void cio_tsch(struct subchannel *sch); |
| | 143 | #else |
| | 144 | #define cio_is_console(schid) 0 |
| | 145 | static inline void cio_register_early_subchannels(void) {} |
| | 146 | #endif |
| | 147 | |
| | 148 | #endif |
projects / deliverable / linux.git / blame_incremental