drivers/s390/cio/cio.h

   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 #else
 121 #define cio_is_console(schid) 0
 122 #define cio_get_console_subchannel() NULL
 123 #define cio_get_console_lock() NULL
 124 #define cio_get_console_priv() NULL
 125 #endif
 126
 127 #endif