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 <asm/chpid.h>
   7 #include "chsc.h"
   8 #include "schid.h"
   9
  10 /*
  11  * path management control word
  12  */
  13 struct pmcw {
  14         u32 intparm;            /* interruption parameter */
  15         u32 qf   : 1;           /* qdio facility */
  16         u32 res0 : 1;           /* reserved zeros */
  17         u32 isc  : 3;           /* interruption sublass */
  18         u32 res5 : 3;           /* reserved zeros */
  19         u32 ena  : 1;           /* enabled */
  20         u32 lm   : 2;           /* limit mode */
  21         u32 mme  : 2;           /* measurement-mode enable */
  22         u32 mp   : 1;           /* multipath mode */
  23         u32 tf   : 1;           /* timing facility */
  24         u32 dnv  : 1;           /* device number valid */
  25         u32 dev  : 16;          /* device number */
  26         u8  lpm;                /* logical path mask */
  27         u8  pnom;               /* path not operational mask */
  28         u8  lpum;               /* last path used mask */
  29         u8  pim;                /* path installed mask */
  30         u16 mbi;                /* measurement-block index */
  31         u8  pom;                /* path operational mask */
  32         u8  pam;                /* path available mask */
  33         u8  chpid[8];           /* CHPID 0-7 (if available) */
  34         u32 unused1 : 8;        /* reserved zeros */
  35         u32 st      : 3;        /* subchannel type */
  36         u32 unused2 : 18;       /* reserved zeros */
  37         u32 mbfc    : 1;        /* measurement block format control */
  38         u32 xmwme   : 1;        /* extended measurement word mode enable */
  39         u32 csense  : 1;        /* concurrent sense; can be enabled ...*/
  40                                 /*  ... per MSCH, however, if facility */
  41                                 /*  ... is not installed, this results */
  42                                 /*  ... in an operand exception.       */
  43 } __attribute__ ((packed));
  44
  45 /*
  46  * subchannel information block
  47  */
  48 struct schib {
  49         struct pmcw pmcw;        /* path management control word */
  50         struct scsw scsw;        /* subchannel status word */
  51         __u64 mba;               /* measurement block address */
  52         __u8 mda[4];             /* model dependent area */
  53 } __attribute__ ((packed,aligned(4)));
  54
  55 /* subchannel data structure used by I/O subroutines */
  56 struct subchannel {
  57         struct subchannel_id schid;
  58         spinlock_t *lock;       /* subchannel lock */
  59         struct mutex reg_mutex;
  60         enum {
  61                 SUBCHANNEL_TYPE_IO = 0,
  62                 SUBCHANNEL_TYPE_CHSC = 1,
  63                 SUBCHANNEL_TYPE_MSG = 2,
  64                 SUBCHANNEL_TYPE_ADM = 3,
  65         } st;                   /* subchannel type */
  66
  67         struct {
  68                 unsigned int suspend:1; /* allow suspend */
  69                 unsigned int prefetch:1;/* deny prefetch */
  70                 unsigned int inter:1;   /* suppress intermediate interrupts */
  71         } __attribute__ ((packed)) options;
  72
  73         __u8 vpm;               /* verified path mask */
  74         __u8 lpm;               /* logical path mask */
  75         __u8 opm;               /* operational path mask */
  76         struct schib schib;     /* subchannel information block */
  77         struct chsc_ssd_info ssd_info;  /* subchannel description */
  78         struct device dev;      /* entry in device tree */
  79         struct css_driver *driver;
  80         void *private; /* private per subchannel type data */
  81 } __attribute__ ((aligned(8)));
  82
  83 #define IO_INTERRUPT_TYPE          0 /* I/O interrupt type */
  84
  85 #define to_subchannel(n) container_of(n, struct subchannel, dev)
  86
  87 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
  88 extern int cio_enable_subchannel(struct subchannel *, unsigned int, u32);
  89 extern int cio_disable_subchannel (struct subchannel *);
  90 extern int cio_cancel (struct subchannel *);
  91 extern int cio_clear (struct subchannel *);
  92 extern int cio_resume (struct subchannel *);
  93 extern int cio_halt (struct subchannel *);
  94 extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
  95 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
  96 extern int cio_cancel (struct subchannel *);
  97 extern int cio_set_options (struct subchannel *, int);
  98 extern int cio_get_options (struct subchannel *);
  99 extern int cio_modify (struct subchannel *);
 100
 101 int cio_create_sch_lock(struct subchannel *);
 102 void do_adapter_IO(void);
 103 void do_IRQ(struct pt_regs *);
 104
 105 /* Use with care. */
 106 #ifdef CONFIG_CCW_CONSOLE
 107 extern struct subchannel *cio_probe_console(void);
 108 extern void cio_release_console(void);
 109 extern int cio_is_console(struct subchannel_id);
 110 extern struct subchannel *cio_get_console_subchannel(void);
 111 extern spinlock_t * cio_get_console_lock(void);
 112 extern void *cio_get_console_priv(void);
 113 #else
 114 #define cio_is_console(schid) 0
 115 #define cio_get_console_subchannel() NULL
 116 #define cio_get_console_lock() NULL
 117 #define cio_get_console_priv() NULL
 118 #endif
 119
 120 extern int cio_show_msg;
 121
 122 #endif