pc-bios/s390-ccw/cio.h

   1 /*
   2  * Channel IO definitions
   3  *
   4  * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
   5  *
   6  * Inspired by various s390 headers in Linux 3.9.
   7  *
   8  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   9  * your option) any later version. See the COPYING file in the top-level
  10  * directory.
  11  */
  12
  13 #ifndef CIO_H
  14 #define CIO_H
  15
  16 /*
  17  * path management control word
  18  */
  19 struct pmcw {
  20     __u32 intparm;        /* interruption parameter */
  21     __u32 qf      : 1;    /* qdio facility */
  22     __u32 w       : 1;
  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 /* Target SCHIB configuration. */
  52 struct schib_config {
  53     __u64 mba;
  54     __u32 intparm;
  55     __u16 mbi;
  56     __u32 isc:3;
  57     __u32 ena:1;
  58     __u32 mme:2;
  59     __u32 mp:1;
  60     __u32 csense:1;
  61     __u32 mbfc:1;
  62 } __attribute__ ((packed));
  63
  64 struct scsw {
  65     __u16 flags;
  66     __u16 ctrl;
  67     __u32 cpa;
  68     __u8 dstat;
  69     __u8 cstat;
  70     __u16 count;
  71 } __attribute__ ((packed));
  72
  73 #define SCSW_FCTL_CLEAR_FUNC 0x1000
  74 #define SCSW_FCTL_HALT_FUNC 0x2000
  75 #define SCSW_FCTL_START_FUNC 0x4000
  76
  77 /*
  78  * subchannel information block
  79  */
  80 struct schib {
  81     struct pmcw pmcw;     /* path management control word */
  82     struct scsw scsw;     /* subchannel status word */
  83     __u64 mba;            /* measurement block address */
  84     __u8 mda[4];          /* model dependent area */
  85 } __attribute__ ((packed,aligned(4)));
  86
  87 struct subchannel_id {
  88         __u32 cssid  : 8;
  89         __u32        : 4;
  90         __u32 m      : 1;
  91         __u32 ssid   : 2;
  92         __u32 one    : 1;
  93         __u32 sch_no : 16;
  94 } __attribute__ ((packed, aligned(4)));
  95
  96 struct chsc_header {
  97     __u16 length;
  98     __u16 code;
  99 } __attribute__((packed));
 100
 101 struct chsc_area_sda {
 102     struct chsc_header request;
 103     __u8 reserved1:4;
 104     __u8 format:4;
 105     __u8 reserved2;
 106     __u16 operation_code;
 107     __u32 reserved3;
 108     __u32 reserved4;
 109     __u32 operation_data_area[252];
 110     struct chsc_header response;
 111     __u32 reserved5:4;
 112     __u32 format2:4;
 113     __u32 reserved6:24;
 114 } __attribute__((packed));
 115
 116 /*
 117  * TPI info structure
 118  */
 119 struct tpi_info {
 120     struct subchannel_id schid;
 121     __u32 intparm;         /* interruption parameter */
 122     __u32 adapter_IO : 1;
 123     __u32 reserved2  : 1;
 124     __u32 isc        : 3;
 125     __u32 reserved3  : 12;
 126     __u32 int_type   : 3;
 127     __u32 reserved4  : 12;
 128 } __attribute__ ((packed));
 129
 130 /* channel command word (type 1) */
 131 struct ccw1 {
 132     __u8 cmd_code;
 133     __u8 flags;
 134     __u16 count;
 135     __u32 cda;
 136 } __attribute__ ((packed));
 137
 138 #define CCW_FLAG_DC              0x80
 139 #define CCW_FLAG_CC              0x40
 140 #define CCW_FLAG_SLI             0x20
 141 #define CCW_FLAG_SKIP            0x10
 142 #define CCW_FLAG_PCI             0x08
 143 #define CCW_FLAG_IDA             0x04
 144 #define CCW_FLAG_SUSPEND         0x02
 145
 146 #define CCW_CMD_NOOP             0x03
 147 #define CCW_CMD_BASIC_SENSE      0x04
 148 #define CCW_CMD_TIC              0x08
 149 #define CCW_CMD_SENSE_ID         0xe4
 150
 151 #define CCW_CMD_SET_VQ           0x13
 152 #define CCW_CMD_VDEV_RESET       0x33
 153 #define CCW_CMD_READ_FEAT        0x12
 154 #define CCW_CMD_WRITE_FEAT       0x11
 155 #define CCW_CMD_READ_CONF        0x22
 156 #define CCW_CMD_WRITE_CONF       0x21
 157 #define CCW_CMD_WRITE_STATUS     0x31
 158 #define CCW_CMD_SET_IND          0x43
 159 #define CCW_CMD_SET_CONF_IND     0x53
 160 #define CCW_CMD_READ_VQ_CONF     0x32
 161
 162 /*
 163  * Command-mode operation request block
 164  */
 165 struct cmd_orb {
 166     __u32 intparm;    /* interruption parameter */
 167     __u32 key:4;      /* flags, like key, suspend control, etc. */
 168     __u32 spnd:1;     /* suspend control */
 169     __u32 res1:1;     /* reserved */
 170     __u32 mod:1;      /* modification control */
 171     __u32 sync:1;     /* synchronize control */
 172     __u32 fmt:1;      /* format control */
 173     __u32 pfch:1;     /* prefetch control */
 174     __u32 isic:1;     /* initial-status-interruption control */
 175     __u32 alcc:1;     /* address-limit-checking control */
 176     __u32 ssic:1;     /* suppress-suspended-interr. control */
 177     __u32 res2:1;     /* reserved */
 178     __u32 c64:1;      /* IDAW/QDIO 64 bit control  */
 179     __u32 i2k:1;      /* IDAW 2/4kB block size control */
 180     __u32 lpm:8;      /* logical path mask */
 181     __u32 ils:1;      /* incorrect length */
 182     __u32 zero:6;     /* reserved zeros */
 183     __u32 orbx:1;     /* ORB extension control */
 184     __u32 cpa;    /* channel program address */
 185 }  __attribute__ ((packed, aligned(4)));
 186
 187 struct ciw {
 188     __u8 type;
 189     __u8 command;
 190     __u16 count;
 191 };
 192
 193 /*
 194  * sense-id response buffer layout
 195  */
 196 struct senseid {
 197     /* common part */
 198     __u8  reserved;   /* always 0x'FF' */
 199     __u16 cu_type;    /* control unit type */
 200     __u8  cu_model;   /* control unit model */
 201     __u16 dev_type;   /* device type */
 202     __u8  dev_model;  /* device model */
 203     __u8  unused;     /* padding byte */
 204     /* extended part */
 205     struct ciw ciw[62];
 206 }  __attribute__ ((packed, aligned(4)));
 207
 208 /* interruption response block */
 209 struct irb {
 210     struct scsw scsw;
 211     __u32 esw[5];
 212     __u32 ecw[8];
 213     __u32 emw[8];
 214 }  __attribute__ ((packed, aligned(4)));
 215
 216 /*
 217  * Some S390 specific IO instructions as inline
 218  */
 219
 220 static inline int stsch_err(struct subchannel_id schid, struct schib *addr)
 221 {
 222     register struct subchannel_id reg1 asm ("1") = schid;
 223     int ccode = -EIO;
 224
 225     asm volatile(
 226         "    stsch    0(%3)\n"
 227         "0:  ipm    %0\n"
 228         "    srl    %0,28\n"
 229         "1:\n"
 230         : "+d" (ccode), "=m" (*addr)
 231         : "d" (reg1), "a" (addr)
 232         : "cc");
 233     return ccode;
 234 }
 235
 236 static inline int msch(struct subchannel_id schid, struct schib *addr)
 237 {
 238     register struct subchannel_id reg1 asm ("1") = schid;
 239     int ccode;
 240
 241     asm volatile(
 242         "    msch    0(%2)\n"
 243         "    ipm    %0\n"
 244         "    srl    %0,28"
 245         : "=d" (ccode)
 246         : "d" (reg1), "a" (addr), "m" (*addr)
 247         : "cc");
 248     return ccode;
 249 }
 250
 251 static inline int msch_err(struct subchannel_id schid, struct schib *addr)
 252 {
 253     register struct subchannel_id reg1 asm ("1") = schid;
 254     int ccode = -EIO;
 255
 256     asm volatile(
 257         "    msch    0(%2)\n"
 258         "0:  ipm    %0\n"
 259         "    srl    %0,28\n"
 260         "1:\n"
 261         : "+d" (ccode)
 262         : "d" (reg1), "a" (addr), "m" (*addr)
 263         : "cc");
 264     return ccode;
 265 }
 266
 267 static inline int tsch(struct subchannel_id schid, struct irb *addr)
 268 {
 269     register struct subchannel_id reg1 asm ("1") = schid;
 270     int ccode;
 271
 272     asm volatile(
 273         "    tsch    0(%3)\n"
 274         "    ipm    %0\n"
 275         "    srl    %0,28"
 276         : "=d" (ccode), "=m" (*addr)
 277         : "d" (reg1), "a" (addr)
 278         : "cc");
 279     return ccode;
 280 }
 281
 282 static inline int ssch(struct subchannel_id schid, struct cmd_orb *addr)
 283 {
 284     register struct subchannel_id reg1 asm("1") = schid;
 285     int ccode = -EIO;
 286
 287     asm volatile(
 288         "    ssch    0(%2)\n"
 289         "0:  ipm    %0\n"
 290         "    srl    %0,28\n"
 291         "1:\n"
 292         : "+d" (ccode)
 293         : "d" (reg1), "a" (addr), "m" (*addr)
 294         : "cc", "memory");
 295     return ccode;
 296 }
 297
 298 static inline int csch(struct subchannel_id schid)
 299 {
 300     register struct subchannel_id reg1 asm("1") = schid;
 301     int ccode;
 302
 303     asm volatile(
 304         "    csch\n"
 305         "    ipm    %0\n"
 306         "    srl    %0,28"
 307         : "=d" (ccode)
 308         : "d" (reg1)
 309         : "cc");
 310     return ccode;
 311 }
 312
 313 static inline int tpi(struct tpi_info *addr)
 314 {
 315     int ccode;
 316
 317     asm volatile(
 318         "    tpi    0(%2)\n"
 319         "    ipm    %0\n"
 320         "    srl    %0,28"
 321         : "=d" (ccode), "=m" (*addr)
 322         : "a" (addr)
 323         : "cc");
 324     return ccode;
 325 }
 326
 327 static inline int chsc(void *chsc_area)
 328 {
 329     typedef struct { char _[4096]; } addr_type;
 330     int cc;
 331
 332     asm volatile(
 333         "    .insn    rre,0xb25f0000,%2,0\n"
 334         "    ipm    %0\n"
 335         "    srl    %0,28\n"
 336         : "=d" (cc), "=m" (*(addr_type *) chsc_area)
 337         : "d" (chsc_area), "m" (*(addr_type *) chsc_area)
 338         : "cc");
 339     return cc;
 340 }
 341
 342 #endif /* CIO_H */