drivers/s390/cio/cio.h

   1 #ifndef S390_CIO_H
   2 #define S390_CIO_H
   3
   4 #include "schid.h"
   5
   6 /*
   7  * where we put the ssd info
   8  */
   9 struct ssd_info {
  10         __u8  valid:1;
  11         __u8  type:7;           /* subchannel type */
  12         __u8  chpid[8];         /* chpids */
  13         __u16 fla[8];           /* full link addresses */
  14 } __attribute__ ((packed));
  15
  16 /*
  17  * path management control word
  18  */
  19 struct pmcw {
  20         __u32 intparm;          /* interruption parameter */
  21         __u32 qf   : 1;         /* qdio facility */
  22         __u32 res0 : 1;         /* reserved zeros */
  23         __u32 isc  : 3;         /* interruption sublass */
  24         __u32 res5 : 3;         /* reserved zeros */
  25         __u32 ena  : 1;         /* enabled */
  26         __u32 lm   : 2;         /* limit mode */
  27         __u32 mme  : 2;         /* measurement-mode enable */
  28         __u32 mp   : 1;         /* multipath mode */
  29         __u32 tf   : 1;         /* timing facility */
  30         __u32 dnv  : 1;         /* device number valid */
  31         __u32 dev  : 16;        /* device number */
  32         __u8  lpm;              /* logical path mask */
  33         __u8  pnom;             /* path not operational mask */
  34         __u8  lpum;             /* last path used mask */
  35         __u8  pim;              /* path installed mask */
  36         __u16 mbi;              /* measurement-block index */
  37         __u8  pom;              /* path operational mask */
  38         __u8  pam;              /* path available mask */
  39         __u8  chpid[8];         /* CHPID 0-7 (if available) */
  40         __u32 unused1 : 8;      /* reserved zeros */
  41         __u32 st      : 3;      /* subchannel type */
  42         __u32 unused2 : 18;     /* reserved zeros */
  43         __u32 mbfc    : 1;      /* measurement block format control */
  44         __u32 xmwme   : 1;      /* extended measurement word mode enable */
  45         __u32 csense  : 1;      /* concurrent sense; can be enabled ...*/
  46                                 /*  ... per MSCH, however, if facility */
  47                                 /*  ... is not installed, this results */
  48                                 /*  ... in an operand exception.       */
  49 } __attribute__ ((packed));
  50
  51 /*
  52  * subchannel information block
  53  */
  54 struct schib {
  55         struct pmcw pmcw;        /* path management control word */
  56         struct scsw scsw;        /* subchannel status word */
  57         __u64 mba;               /* measurement block address */
  58         __u8 mda[4];             /* model dependent area */
  59 } __attribute__ ((packed,aligned(4)));
  60
  61 /*
  62  * operation request block
  63  */
  64 struct orb {
  65         __u32 intparm;          /* interruption parameter */
  66         __u32 key  : 4;         /* flags, like key, suspend control, etc. */
  67         __u32 spnd : 1;         /* suspend control */
  68         __u32 res1 : 1;         /* reserved */
  69         __u32 mod  : 1;         /* modification control */
  70         __u32 sync : 1;         /* synchronize control */
  71         __u32 fmt  : 1;         /* format control */
  72         __u32 pfch : 1;         /* prefetch control */
  73         __u32 isic : 1;         /* initial-status-interruption control */
  74         __u32 alcc : 1;         /* address-limit-checking control */
  75         __u32 ssic : 1;         /* suppress-suspended-interr. control */
  76         __u32 res2 : 1;         /* reserved */
  77         __u32 c64  : 1;         /* IDAW/QDIO 64 bit control  */
  78         __u32 i2k  : 1;         /* IDAW 2/4kB block size control */
  79         __u32 lpm  : 8;         /* logical path mask */
  80         __u32 ils  : 1;         /* incorrect length */
  81         __u32 zero : 6;         /* reserved zeros */
  82         __u32 orbx : 1;         /* ORB extension control */
  83         __u32 cpa;              /* channel program address */
  84 }  __attribute__ ((packed,aligned(4)));
  85
  86 /* subchannel data structure used by I/O subroutines */
  87 struct subchannel {
  88         struct subchannel_id schid;
  89         spinlock_t lock;        /* subchannel lock */
  90
  91         enum {
  92                 SUBCHANNEL_TYPE_IO = 0,
  93                 SUBCHANNEL_TYPE_CHSC = 1,
  94                 SUBCHANNEL_TYPE_MESSAGE = 2,
  95                 SUBCHANNEL_TYPE_ADM = 3,
  96         } st;                   /* subchannel type */
  97
  98         struct {
  99                 unsigned int suspend:1; /* allow suspend */
 100                 unsigned int prefetch:1;/* deny prefetch */
 101                 unsigned int inter:1;   /* suppress intermediate interrupts */
 102         } __attribute__ ((packed)) options;
 103
 104         __u8 vpm;               /* verified path mask */
 105         __u8 lpm;               /* logical path mask */
 106         __u8 opm;               /* operational path mask */
 107         struct schib schib;     /* subchannel information block */
 108         struct orb orb;         /* operation request block */
 109         struct ccw1 sense_ccw;  /* static ccw for sense command */
 110         struct ssd_info ssd_info;       /* subchannel description */
 111         struct device dev;      /* entry in device tree */
 112         struct css_driver *driver;
 113 } __attribute__ ((aligned(8)));
 114
 115 #define IO_INTERRUPT_TYPE          0 /* I/O interrupt type */
 116
 117 #define to_subchannel(n) container_of(n, struct subchannel, dev)
 118
 119 extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
 120 extern int cio_enable_subchannel (struct subchannel *, unsigned int);
 121 extern int cio_disable_subchannel (struct subchannel *);
 122 extern int cio_cancel (struct subchannel *);
 123 extern int cio_clear (struct subchannel *);
 124 extern int cio_resume (struct subchannel *);
 125 extern int cio_halt (struct subchannel *);
 126 extern int cio_start (struct subchannel *, struct ccw1 *, __u8);
 127 extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
 128 extern int cio_cancel (struct subchannel *);
 129 extern int cio_set_options (struct subchannel *, int);
 130 extern int cio_get_options (struct subchannel *);
 131 extern int cio_modify (struct subchannel *);
 132
 133 /* Use with care. */
 134 #ifdef CONFIG_CCW_CONSOLE
 135 extern struct subchannel *cio_probe_console(void);
 136 extern void cio_release_console(void);
 137 extern int cio_is_console(struct subchannel_id);
 138 extern struct subchannel *cio_get_console_subchannel(void);
 139 #else
 140 #define cio_is_console(schid) 0
 141 #define cio_get_console_subchannel() NULL
 142 #endif
 143
 144 extern int cio_show_msg;
 145
 146 #endif