include/asm-s390/cio.h

   1 /*
   2  *  include/asm-s390/cio.h
   3  *  include/asm-s390x/cio.h
   4  *
   5  * Common interface for I/O on S/390
   6  */
   7 #ifndef _ASM_S390_CIO_H_
   8 #define _ASM_S390_CIO_H_
   9
  10 #include <linux/spinlock.h>
  11 #include <asm/types.h>
  12
  13 #ifdef __KERNEL__
  14
  15 #define LPM_ANYPATH 0xff
  16 #define __MAX_CSSID 0
  17
  18 /*
  19  * subchannel status word
  20  */
  21 struct scsw {
  22         __u32 key  : 4;         /* subchannel key */
  23         __u32 sctl : 1;         /* suspend control */
  24         __u32 eswf : 1;         /* ESW format */
  25         __u32 cc   : 2;         /* deferred condition code */
  26         __u32 fmt  : 1;         /* format */
  27         __u32 pfch : 1;         /* prefetch */
  28         __u32 isic : 1;         /* initial-status interruption control */
  29         __u32 alcc : 1;         /* address-limit checking control */
  30         __u32 ssi  : 1;         /* supress-suspended interruption */
  31         __u32 zcc  : 1;         /* zero condition code */
  32         __u32 ectl : 1;         /* extended control */
  33         __u32 pno  : 1;         /* path not operational */
  34         __u32 res  : 1;         /* reserved */
  35         __u32 fctl : 3;         /* function control */
  36         __u32 actl : 7;         /* activity control */
  37         __u32 stctl : 5;        /* status control */
  38         __u32 cpa;              /* channel program address */
  39         __u32 dstat : 8;        /* device status */
  40         __u32 cstat : 8;        /* subchannel status */
  41         __u32 count : 16;       /* residual count */
  42 } __attribute__ ((packed));
  43
  44 #define SCSW_FCTL_CLEAR_FUNC     0x1
  45 #define SCSW_FCTL_HALT_FUNC      0x2
  46 #define SCSW_FCTL_START_FUNC     0x4
  47
  48 #define SCSW_ACTL_SUSPENDED      0x1
  49 #define SCSW_ACTL_DEVACT         0x2
  50 #define SCSW_ACTL_SCHACT         0x4
  51 #define SCSW_ACTL_CLEAR_PEND     0x8
  52 #define SCSW_ACTL_HALT_PEND      0x10
  53 #define SCSW_ACTL_START_PEND     0x20
  54 #define SCSW_ACTL_RESUME_PEND    0x40
  55
  56 #define SCSW_STCTL_STATUS_PEND   0x1
  57 #define SCSW_STCTL_SEC_STATUS    0x2
  58 #define SCSW_STCTL_PRIM_STATUS   0x4
  59 #define SCSW_STCTL_INTER_STATUS  0x8
  60 #define SCSW_STCTL_ALERT_STATUS  0x10
  61
  62 #define DEV_STAT_ATTENTION       0x80
  63 #define DEV_STAT_STAT_MOD        0x40
  64 #define DEV_STAT_CU_END          0x20
  65 #define DEV_STAT_BUSY            0x10
  66 #define DEV_STAT_CHN_END         0x08
  67 #define DEV_STAT_DEV_END         0x04
  68 #define DEV_STAT_UNIT_CHECK      0x02
  69 #define DEV_STAT_UNIT_EXCEP      0x01
  70
  71 #define SCHN_STAT_PCI            0x80
  72 #define SCHN_STAT_INCORR_LEN     0x40
  73 #define SCHN_STAT_PROG_CHECK     0x20
  74 #define SCHN_STAT_PROT_CHECK     0x10
  75 #define SCHN_STAT_CHN_DATA_CHK   0x08
  76 #define SCHN_STAT_CHN_CTRL_CHK   0x04
  77 #define SCHN_STAT_INTF_CTRL_CHK  0x02
  78 #define SCHN_STAT_CHAIN_CHECK    0x01
  79
  80 /*
  81  * architectured values for first sense byte
  82  */
  83 #define SNS0_CMD_REJECT         0x80
  84 #define SNS_CMD_REJECT          SNS0_CMD_REJEC
  85 #define SNS0_INTERVENTION_REQ   0x40
  86 #define SNS0_BUS_OUT_CHECK      0x20
  87 #define SNS0_EQUIPMENT_CHECK    0x10
  88 #define SNS0_DATA_CHECK         0x08
  89 #define SNS0_OVERRUN            0x04
  90 #define SNS0_INCOMPL_DOMAIN     0x01
  91
  92 /*
  93  * architectured values for second sense byte
  94  */
  95 #define SNS1_PERM_ERR           0x80
  96 #define SNS1_INV_TRACK_FORMAT   0x40
  97 #define SNS1_EOC                0x20
  98 #define SNS1_MESSAGE_TO_OPER    0x10
  99 #define SNS1_NO_REC_FOUND       0x08
 100 #define SNS1_FILE_PROTECTED     0x04
 101 #define SNS1_WRITE_INHIBITED    0x02
 102 #define SNS1_INPRECISE_END      0x01
 103
 104 /*
 105  * architectured values for third sense byte
 106  */
 107 #define SNS2_REQ_INH_WRITE      0x80
 108 #define SNS2_CORRECTABLE        0x40
 109 #define SNS2_FIRST_LOG_ERR      0x20
 110 #define SNS2_ENV_DATA_PRESENT   0x10
 111 #define SNS2_INPRECISE_END      0x04
 112
 113 struct ccw1 {
 114         __u8  cmd_code;         /* command code */
 115         __u8  flags;            /* flags, like IDA addressing, etc. */
 116         __u16 count;            /* byte count */
 117         __u32 cda;              /* data address */
 118 } __attribute__ ((packed,aligned(8)));
 119
 120 #define CCW_FLAG_DC             0x80
 121 #define CCW_FLAG_CC             0x40
 122 #define CCW_FLAG_SLI            0x20
 123 #define CCW_FLAG_SKIP           0x10
 124 #define CCW_FLAG_PCI            0x08
 125 #define CCW_FLAG_IDA            0x04
 126 #define CCW_FLAG_SUSPEND        0x02
 127
 128 #define CCW_CMD_READ_IPL        0x02
 129 #define CCW_CMD_NOOP            0x03
 130 #define CCW_CMD_BASIC_SENSE     0x04
 131 #define CCW_CMD_TIC             0x08
 132 #define CCW_CMD_STLCK           0x14
 133 #define CCW_CMD_SENSE_PGID      0x34
 134 #define CCW_CMD_SUSPEND_RECONN  0x5B
 135 #define CCW_CMD_RDC             0x64
 136 #define CCW_CMD_RELEASE         0x94
 137 #define CCW_CMD_SET_PGID        0xAF
 138 #define CCW_CMD_SENSE_ID        0xE4
 139 #define CCW_CMD_DCTL            0xF3
 140
 141 #define SENSE_MAX_COUNT         0x20
 142
 143 struct erw {
 144         __u32 res0  : 3;        /* reserved */
 145         __u32 auth  : 1;        /* Authorization check */
 146         __u32 pvrf  : 1;        /* path-verification-required flag */
 147         __u32 cpt   : 1;        /* channel-path timeout */
 148         __u32 fsavf : 1;        /* Failing storage address validity flag */
 149         __u32 cons  : 1;        /* concurrent-sense */
 150         __u32 scavf : 1;        /* Secondary ccw address validity flag */
 151         __u32 fsaf  : 1;        /* Failing storage address format */
 152         __u32 scnt  : 6;        /* sense count if cons == 1 */
 153         __u32 res16 : 16;       /* reserved */
 154 } __attribute__ ((packed));
 155
 156 /*
 157  * subchannel logout area
 158  */
 159 struct sublog {
 160         __u32 res0  : 1;        /* reserved */
 161         __u32 esf   : 7;        /* extended status flags */
 162         __u32 lpum  : 8;        /* last path used mask */
 163         __u32 arep  : 1;        /* ancillary report */
 164         __u32 fvf   : 5;        /* field-validity flags */
 165         __u32 sacc  : 2;        /* storage access code */
 166         __u32 termc : 2;        /* termination code */
 167         __u32 devsc : 1;        /* device-status check */
 168         __u32 serr  : 1;        /* secondary error */
 169         __u32 ioerr : 1;        /* i/o-error alert */
 170         __u32 seqc  : 3;        /* sequence code */
 171 } __attribute__ ((packed));
 172
 173 /*
 174  * Format 0 Extended Status Word (ESW)
 175  */
 176 struct esw0 {
 177         struct sublog sublog;   /* subchannel logout */
 178         struct erw erw;         /* extended report word */
 179         __u32  faddr[2];        /* failing storage address */
 180         __u32  saddr;           /* secondary ccw address */
 181 } __attribute__ ((packed));
 182
 183 /*
 184  * Format 1 Extended Status Word (ESW)
 185  */
 186 struct esw1 {
 187         __u8  zero0;            /* reserved zeros */
 188         __u8  lpum;             /* last path used mask */
 189         __u16 zero16;           /* reserved zeros */
 190         struct erw erw;         /* extended report word */
 191         __u32 zeros[3];         /* 2 fullwords of zeros */
 192 } __attribute__ ((packed));
 193
 194 /*
 195  * Format 2 Extended Status Word (ESW)
 196  */
 197 struct esw2 {
 198         __u8  zero0;            /* reserved zeros */
 199         __u8  lpum;             /* last path used mask */
 200         __u16 dcti;             /* device-connect-time interval */
 201         struct erw erw;         /* extended report word */
 202         __u32 zeros[3];         /* 2 fullwords of zeros */
 203 } __attribute__ ((packed));
 204
 205 /*
 206  * Format 3 Extended Status Word (ESW)
 207  */
 208 struct esw3 {
 209         __u8  zero0;            /* reserved zeros */
 210         __u8  lpum;             /* last path used mask */
 211         __u16 res;              /* reserved */
 212         struct erw erw;         /* extended report word */
 213         __u32 zeros[3];         /* 2 fullwords of zeros */
 214 } __attribute__ ((packed));
 215
 216 /*
 217  * interruption response block
 218  */
 219 struct irb {
 220         struct scsw scsw;       /* subchannel status word */
 221         union {                 /* extended status word, 4 formats */
 222                 struct esw0 esw0;
 223                 struct esw1 esw1;
 224                 struct esw2 esw2;
 225                 struct esw3 esw3;
 226         } esw;
 227         __u8   ecw[32];         /* extended control word */
 228 } __attribute__ ((packed,aligned(4)));
 229
 230 /*
 231  * command information word  (CIW) layout
 232  */
 233 struct ciw {
 234         __u32 et       :  2;    /* entry type */
 235         __u32 reserved :  2;    /* reserved */
 236         __u32 ct       :  4;    /* command type */
 237         __u32 cmd      :  8;    /* command */
 238         __u32 count    : 16;    /* coun */
 239 } __attribute__ ((packed));
 240
 241 #define CIW_TYPE_RCD    0x0     /* read configuration data */
 242 #define CIW_TYPE_SII    0x1     /* set interface identifier */
 243 #define CIW_TYPE_RNI    0x2     /* read node identifier */
 244
 245 /*
 246  * Flags used as input parameters for do_IO()
 247  */
 248 #define DOIO_ALLOW_SUSPEND       0x0001 /* allow for channel prog. suspend */
 249 #define DOIO_DENY_PREFETCH       0x0002 /* don't allow for CCW prefetch */
 250 #define DOIO_SUPPRESS_INTER      0x0004 /* suppress intermediate inter. */
 251                                         /* ... for suspended CCWs */
 252 /* Device or subchannel gone. */
 253 #define CIO_GONE       0x0001
 254 /* No path to device. */
 255 #define CIO_NO_PATH    0x0002
 256 /* Device has appeared. */
 257 #define CIO_OPER       0x0004
 258 /* Sick revalidation of device. */
 259 #define CIO_REVALIDATE 0x0008
 260
 261 struct diag210 {
 262         __u16 vrdcdvno : 16;   /* device number (input) */
 263         __u16 vrdclen  : 16;   /* data block length (input) */
 264         __u32 vrdcvcla : 8;    /* virtual device class (output) */
 265         __u32 vrdcvtyp : 8;    /* virtual device type (output) */
 266         __u32 vrdcvsta : 8;    /* virtual device status (output) */
 267         __u32 vrdcvfla : 8;    /* virtual device flags (output) */
 268         __u32 vrdcrccl : 8;    /* real device class (output) */
 269         __u32 vrdccrty : 8;    /* real device type (output) */
 270         __u32 vrdccrmd : 8;    /* real device model (output) */
 271         __u32 vrdccrft : 8;    /* real device feature (output) */
 272 } __attribute__ ((packed,aligned(4)));
 273
 274 struct ccw_dev_id {
 275         u8 ssid;
 276         u16 devno;
 277 };
 278
 279 static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
 280                                       struct ccw_dev_id *dev_id2)
 281 {
 282         if ((dev_id1->ssid == dev_id2->ssid) &&
 283             (dev_id1->devno == dev_id2->devno))
 284                 return 1;
 285         return 0;
 286 }
 287
 288 extern int diag210(struct diag210 *addr);
 289
 290 extern void wait_cons_dev(void);
 291
 292 extern void css_schedule_reprobe(void);
 293
 294 extern void reipl_ccw_dev(struct ccw_dev_id *id);
 295
 296 struct cio_iplinfo {
 297         u16 devno;
 298         int is_qdio;
 299 };
 300
 301 extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo);
 302
 303 #endif
 304
 305 #endif