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