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 */ 16struct 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. */ 49struct 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 */ 64struct 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 71enum sch_todo { 72 SCH_TODO_NOTHING, 73 SCH_TODO_UNREG, 74}; 75 76/* subchannel data structure used by I/O subroutines */ 77struct 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 88 struct { 89 unsigned int suspend:1; /* allow suspend */ 90 unsigned int prefetch:1;/* deny prefetch */ 91 unsigned int inter:1; /* suppress intermediate interrupts */ 92 } __attribute__ ((packed)) options; 93 94 __u8 vpm; /* verified path mask */ 95 __u8 lpm; /* logical path mask */ 96 __u8 opm; /* operational path mask */ 97 struct schib schib; /* subchannel information block */ 98 int isc; /* desired interruption subclass */ 99 struct chsc_ssd_info ssd_info; /* subchannel description */ 100 struct device dev; /* entry in device tree */ 101 struct css_driver *driver; 102 void *private; /* private per subchannel type data */ 103 enum sch_todo todo; 104 struct work_struct todo_work; 105 struct schib_config config; 106} __attribute__ ((aligned(8))); 107 108#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */ 109 110#define to_subchannel(n) container_of(n, struct subchannel, dev) 111 112extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id); 113extern int cio_enable_subchannel(struct subchannel *, u32); 114extern int cio_disable_subchannel (struct subchannel *); 115extern int cio_cancel (struct subchannel *); 116extern int cio_clear (struct subchannel *); 117extern int cio_resume (struct subchannel *); 118extern int cio_halt (struct subchannel *); 119extern int cio_start (struct subchannel *, struct ccw1 *, __u8); 120extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8); 121extern int cio_cancel (struct subchannel *); 122extern int cio_set_options (struct subchannel *, int); 123extern int cio_get_options (struct subchannel *); 124extern int cio_update_schib(struct subchannel *sch); 125extern int cio_commit_config(struct subchannel *sch); 126 127int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key); 128int cio_tm_intrg(struct subchannel *sch); 129 130int cio_create_sch_lock(struct subchannel *); 131void do_adapter_IO(u8 isc); 132void do_IRQ(struct pt_regs *); 133 134/* Use with care. */ 135#ifdef CONFIG_CCW_CONSOLE 136extern struct subchannel *cio_probe_console(void); 137extern void cio_release_console(void); 138extern int cio_is_console(struct subchannel_id); 139extern struct subchannel *cio_get_console_subchannel(void); 140extern spinlock_t * cio_get_console_lock(void); 141extern void *cio_get_console_priv(void); 142#else 143#define cio_is_console(schid) 0 144#define cio_get_console_subchannel() NULL 145#define cio_get_console_lock() NULL 146#define cio_get_console_priv() NULL 147#endif 148 149#endif 150