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