linux/drivers/s390/char/sclp.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright IBM Corp. 1999,2012
   4 *
   5 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
   6 *            Martin Schwidefsky <schwidefsky@de.ibm.com>
   7 */
   8
   9#ifndef __SCLP_H__
  10#define __SCLP_H__
  11
  12#include <linux/types.h>
  13#include <linux/list.h>
  14#include <asm/sclp.h>
  15#include <asm/ebcdic.h>
  16
  17/* maximum number of pages concerning our own memory management */
  18#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
  19#define SCLP_CONSOLE_PAGES      6
  20
  21#define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T)))
  22
  23#define EVTYP_OPCMD             0x01
  24#define EVTYP_MSG               0x02
  25#define EVTYP_CONFMGMDATA       0x04
  26#define EVTYP_DIAG_TEST         0x07
  27#define EVTYP_STATECHANGE       0x08
  28#define EVTYP_PMSGCMD           0x09
  29#define EVTYP_ASYNC             0x0A
  30#define EVTYP_CTLPROGIDENT      0x0B
  31#define EVTYP_STORE_DATA        0x0C
  32#define EVTYP_ERRNOTIFY         0x18
  33#define EVTYP_VT220MSG          0x1A
  34#define EVTYP_SDIAS             0x1C
  35#define EVTYP_SIGQUIESCE        0x1D
  36#define EVTYP_OCF               0x1E
  37
  38#define EVTYP_OPCMD_MASK        SCLP_EVTYP_MASK(EVTYP_OPCMD)
  39#define EVTYP_MSG_MASK          SCLP_EVTYP_MASK(EVTYP_MSG)
  40#define EVTYP_CONFMGMDATA_MASK  SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
  41#define EVTYP_DIAG_TEST_MASK    SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
  42#define EVTYP_STATECHANGE_MASK  SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
  43#define EVTYP_PMSGCMD_MASK      SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
  44#define EVTYP_ASYNC_MASK        SCLP_EVTYP_MASK(EVTYP_ASYNC)
  45#define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
  46#define EVTYP_STORE_DATA_MASK   SCLP_EVTYP_MASK(EVTYP_STORE_DATA)
  47#define EVTYP_ERRNOTIFY_MASK    SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
  48#define EVTYP_VT220MSG_MASK     SCLP_EVTYP_MASK(EVTYP_VT220MSG)
  49#define EVTYP_SDIAS_MASK        SCLP_EVTYP_MASK(EVTYP_SDIAS)
  50#define EVTYP_SIGQUIESCE_MASK   SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
  51#define EVTYP_OCF_MASK          SCLP_EVTYP_MASK(EVTYP_OCF)
  52
  53#define GNRLMSGFLGS_DOM         0x8000
  54#define GNRLMSGFLGS_SNDALRM     0x4000
  55#define GNRLMSGFLGS_HOLDMSG     0x2000
  56
  57#define LNTPFLGS_CNTLTEXT       0x8000
  58#define LNTPFLGS_LABELTEXT      0x4000
  59#define LNTPFLGS_DATATEXT       0x2000
  60#define LNTPFLGS_ENDTEXT        0x1000
  61#define LNTPFLGS_PROMPTTEXT     0x0800
  62
  63typedef unsigned int sclp_cmdw_t;
  64
  65#define SCLP_CMDW_READ_CPU_INFO         0x00010001
  66#define SCLP_CMDW_READ_SCP_INFO         0x00020001
  67#define SCLP_CMDW_READ_STORAGE_INFO     0x00040001
  68#define SCLP_CMDW_READ_SCP_INFO_FORCED  0x00120001
  69#define SCLP_CMDW_READ_EVENT_DATA       0x00770005
  70#define SCLP_CMDW_WRITE_EVENT_DATA      0x00760005
  71#define SCLP_CMDW_WRITE_EVENT_MASK      0x00780005
  72
  73#define GDS_ID_MDSMU            0x1310
  74#define GDS_ID_MDSROUTEINFO     0x1311
  75#define GDS_ID_AGUNWRKCORR      0x1549
  76#define GDS_ID_SNACONDREPORT    0x1532
  77#define GDS_ID_CPMSU            0x1212
  78#define GDS_ID_ROUTTARGINSTR    0x154D
  79#define GDS_ID_OPREQ            0x8070
  80#define GDS_ID_TEXTCMD          0x1320
  81
  82#define GDS_KEY_SELFDEFTEXTMSG  0x31
  83
  84typedef u64 sccb_mask_t;
  85
  86struct sccb_header {
  87        u16     length;
  88        u8      function_code;
  89        u8      control_mask[3];
  90        u16     response_code;
  91} __attribute__((packed));
  92
  93struct init_sccb {
  94        struct sccb_header header;
  95        u16 _reserved;
  96        u16 mask_length;
  97        u8 masks[4 * 1021];     /* variable length */
  98        /*
  99         * u8 receive_mask[mask_length];
 100         * u8 send_mask[mask_length];
 101         * u8 sclp_receive_mask[mask_length];
 102         * u8 sclp_send_mask[mask_length];
 103         */
 104} __attribute__((packed));
 105
 106#define SCLP_MASK_SIZE_COMPAT 4
 107
 108static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i)
 109{
 110        sccb_mask_t res = 0;
 111
 112        memcpy(&res, masks + i * len, min(sizeof(res), len));
 113        return res;
 114}
 115
 116static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val)
 117{
 118        memset(masks + i * len, 0, len);
 119        memcpy(masks + i * len, &val, min(sizeof(val), len));
 120}
 121
 122#define sccb_get_generic_mask(sccb, i)                                  \
 123({                                                                      \
 124        __typeof__(sccb) __sccb = sccb;                                 \
 125                                                                        \
 126        sccb_get_mask(__sccb->masks, __sccb->mask_length, i);           \
 127})
 128#define sccb_get_recv_mask(sccb)        sccb_get_generic_mask(sccb, 0)
 129#define sccb_get_send_mask(sccb)        sccb_get_generic_mask(sccb, 1)
 130#define sccb_get_sclp_recv_mask(sccb)   sccb_get_generic_mask(sccb, 2)
 131#define sccb_get_sclp_send_mask(sccb)   sccb_get_generic_mask(sccb, 3)
 132
 133#define sccb_set_generic_mask(sccb, i, val)                             \
 134({                                                                      \
 135        __typeof__(sccb) __sccb = sccb;                                 \
 136                                                                        \
 137        sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val);      \
 138})
 139#define sccb_set_recv_mask(sccb, val)       sccb_set_generic_mask(sccb, 0, val)
 140#define sccb_set_send_mask(sccb, val)       sccb_set_generic_mask(sccb, 1, val)
 141#define sccb_set_sclp_recv_mask(sccb, val)  sccb_set_generic_mask(sccb, 2, val)
 142#define sccb_set_sclp_send_mask(sccb, val)  sccb_set_generic_mask(sccb, 3, val)
 143
 144struct read_cpu_info_sccb {
 145        struct  sccb_header header;
 146        u16     nr_configured;
 147        u16     offset_configured;
 148        u16     nr_standby;
 149        u16     offset_standby;
 150        /*
 151         * Without ext sccb, struct size is PAGE_SIZE.
 152         * With ext sccb, struct size is EXT_SCCB_READ_CPU.
 153         */
 154        u8      reserved[];
 155} __attribute__((packed, aligned(PAGE_SIZE)));
 156
 157struct read_info_sccb {
 158        struct  sccb_header header;     /* 0-7 */
 159        u16     rnmax;                  /* 8-9 */
 160        u8      rnsize;                 /* 10 */
 161        u8      _pad_11[16 - 11];       /* 11-15 */
 162        u16     ncpurl;                 /* 16-17 */
 163        u16     cpuoff;                 /* 18-19 */
 164        u8      _pad_20[24 - 20];       /* 20-23 */
 165        u8      loadparm[8];            /* 24-31 */
 166        u8      _pad_32[42 - 32];       /* 32-41 */
 167        u8      fac42;                  /* 42 */
 168        u8      fac43;                  /* 43 */
 169        u8      _pad_44[48 - 44];       /* 44-47 */
 170        u64     facilities;             /* 48-55 */
 171        u8      _pad_56[66 - 56];       /* 56-65 */
 172        u8      fac66;                  /* 66 */
 173        u8      _pad_67[76 - 67];       /* 67-83 */
 174        u32     ibc;                    /* 76-79 */
 175        u8      _pad80[84 - 80];        /* 80-83 */
 176        u8      fac84;                  /* 84 */
 177        u8      fac85;                  /* 85 */
 178        u8      _pad_86[91 - 86];       /* 86-90 */
 179        u8      fac91;                  /* 91 */
 180        u8      _pad_92[98 - 92];       /* 92-97 */
 181        u8      fac98;                  /* 98 */
 182        u8      hamaxpow;               /* 99 */
 183        u32     rnsize2;                /* 100-103 */
 184        u64     rnmax2;                 /* 104-111 */
 185        u32     hsa_size;               /* 112-115 */
 186        u8      fac116;                 /* 116 */
 187        u8      fac117;                 /* 117 */
 188        u8      fac118;                 /* 118 */
 189        u8      fac119;                 /* 119 */
 190        u16     hcpua;                  /* 120-121 */
 191        u8      _pad_122[124 - 122];    /* 122-123 */
 192        u32     hmfai;                  /* 124-127 */
 193        u8      _pad_128[134 - 128];    /* 128-133 */
 194        u8      byte_134;                       /* 134 */
 195        u8      cpudirq;                /* 135 */
 196        u16     cbl;                    /* 136-137 */
 197        u8      _pad_138[EXT_SCCB_READ_SCP - 138];
 198} __packed __aligned(PAGE_SIZE);
 199
 200struct read_storage_sccb {
 201        struct sccb_header header;
 202        u16 max_id;
 203        u16 assigned;
 204        u16 standby;
 205        u16 :16;
 206        u32 entries[0];
 207} __packed;
 208
 209static inline void sclp_fill_core_info(struct sclp_core_info *info,
 210                                       struct read_cpu_info_sccb *sccb)
 211{
 212        char *page = (char *) sccb;
 213
 214        memset(info, 0, sizeof(*info));
 215        info->configured = sccb->nr_configured;
 216        info->standby = sccb->nr_standby;
 217        info->combined = sccb->nr_configured + sccb->nr_standby;
 218        memcpy(&info->core, page + sccb->offset_configured,
 219               info->combined * sizeof(struct sclp_core_entry));
 220}
 221
 222#define SCLP_HAS_CHP_INFO       (sclp.facilities & 0x8000000000000000ULL)
 223#define SCLP_HAS_CHP_RECONFIG   (sclp.facilities & 0x2000000000000000ULL)
 224#define SCLP_HAS_CPU_INFO       (sclp.facilities & 0x0800000000000000ULL)
 225#define SCLP_HAS_CPU_RECONFIG   (sclp.facilities & 0x0400000000000000ULL)
 226#define SCLP_HAS_PCI_RECONFIG   (sclp.facilities & 0x0000000040000000ULL)
 227#define SCLP_HAS_AP_RECONFIG    (sclp.facilities & 0x0000000100000000ULL)
 228
 229struct gds_subvector {
 230        u8      length;
 231        u8      key;
 232} __attribute__((packed));
 233
 234struct gds_vector {
 235        u16     length;
 236        u16     gds_id;
 237} __attribute__((packed));
 238
 239struct evbuf_header {
 240        u16     length;
 241        u8      type;
 242        u8      flags;
 243        u16     _reserved;
 244} __attribute__((packed));
 245
 246struct sclp_req {
 247        struct list_head list;          /* list_head for request queueing. */
 248        sclp_cmdw_t command;            /* sclp command to execute */
 249        void    *sccb;                  /* pointer to the sccb to execute */
 250        char    status;                 /* status of this request */
 251        int     start_count;            /* number of SVCs done for this req */
 252        /* Callback that is called after reaching final status. */
 253        void (*callback)(struct sclp_req *, void *data);
 254        void *callback_data;
 255        int queue_timeout;              /* request queue timeout (sec), set by
 256                                           caller of sclp_add_request(), if
 257                                           needed */
 258        /* Internal fields */
 259        unsigned long queue_expires;    /* request queue timeout (jiffies) */
 260};
 261
 262#define SCLP_REQ_FILLED   0x00  /* request is ready to be processed */
 263#define SCLP_REQ_QUEUED   0x01  /* request is queued to be processed */
 264#define SCLP_REQ_RUNNING  0x02  /* request is currently running */
 265#define SCLP_REQ_DONE     0x03  /* request is completed successfully */
 266#define SCLP_REQ_FAILED   0x05  /* request is finally failed */
 267#define SCLP_REQ_QUEUED_TIMEOUT 0x06    /* request on queue timed out */
 268
 269#define SCLP_QUEUE_INTERVAL 5   /* timeout interval for request queue */
 270
 271/* function pointers that a high level driver has to use for registration */
 272/* of some routines it wants to be called from the low level driver */
 273struct sclp_register {
 274        struct list_head list;
 275        /* User wants to receive: */
 276        sccb_mask_t receive_mask;
 277        /* User wants to send: */
 278        sccb_mask_t send_mask;
 279        /* H/W can receive: */
 280        sccb_mask_t sclp_receive_mask;
 281        /* H/W can send: */
 282        sccb_mask_t sclp_send_mask;
 283        /* called if event type availability changes */
 284        void (*state_change_fn)(struct sclp_register *);
 285        /* called for events in cp_receive_mask/sclp_receive_mask */
 286        void (*receiver_fn)(struct evbuf_header *);
 287};
 288
 289/* externals from sclp.c */
 290int sclp_add_request(struct sclp_req *req);
 291void sclp_sync_wait(void);
 292int sclp_register(struct sclp_register *reg);
 293void sclp_unregister(struct sclp_register *reg);
 294int sclp_remove_processed(struct sccb_header *sccb);
 295int sclp_deactivate(void);
 296int sclp_reactivate(void);
 297int sclp_sync_request(sclp_cmdw_t command, void *sccb);
 298int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
 299int sclp_sdias_init(void);
 300
 301enum {
 302        sclp_init_state_uninitialized,
 303        sclp_init_state_initializing,
 304        sclp_init_state_initialized
 305};
 306
 307extern int sclp_init_state;
 308extern int sclp_console_pages;
 309extern int sclp_console_drop;
 310extern unsigned long sclp_console_full;
 311extern bool sclp_mask_compat_mode;
 312
 313extern char *sclp_early_sccb;
 314
 315void sclp_early_wait_irq(void);
 316int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
 317unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
 318unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
 319int sclp_early_set_event_mask(struct init_sccb *sccb,
 320                              sccb_mask_t receive_mask,
 321                              sccb_mask_t send_mask);
 322struct read_info_sccb * __init sclp_early_get_info(void);
 323
 324/* useful inlines */
 325
 326/* Perform service call. Return 0 on success, non-zero otherwise. */
 327static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
 328{
 329        int cc = 4; /* Initialize for program check handling */
 330
 331        asm volatile(
 332                "0:     .insn   rre,0xb2200000,%1,%2\n"  /* servc %1,%2 */
 333                "1:     ipm     %0\n"
 334                "       srl     %0,28\n"
 335                "2:\n"
 336                EX_TABLE(0b, 2b)
 337                EX_TABLE(1b, 2b)
 338                : "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
 339                : "cc", "memory");
 340        if (cc == 4)
 341                return -EINVAL;
 342        if (cc == 3)
 343                return -EIO;
 344        if (cc == 2)
 345                return -EBUSY;
 346        return 0;
 347}
 348
 349/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
 350/* translate single character from ASCII to EBCDIC */
 351static inline unsigned char
 352sclp_ascebc(unsigned char ch)
 353{
 354        return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
 355}
 356
 357/* translate string from EBCDIC to ASCII */
 358static inline void
 359sclp_ebcasc_str(char *str, int nr)
 360{
 361        (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
 362}
 363
 364/* translate string from ASCII to EBCDIC */
 365static inline void
 366sclp_ascebc_str(char *str, int nr)
 367{
 368        (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
 369}
 370
 371static inline struct gds_vector *
 372sclp_find_gds_vector(void *start, void *end, u16 id)
 373{
 374        struct gds_vector *v;
 375
 376        for (v = start; (void *) v < end; v = (void *) v + v->length)
 377                if (v->gds_id == id)
 378                        return v;
 379        return NULL;
 380}
 381
 382static inline struct gds_subvector *
 383sclp_find_gds_subvector(void *start, void *end, u8 key)
 384{
 385        struct gds_subvector *sv;
 386
 387        for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
 388                if (sv->key == key)
 389                        return sv;
 390        return NULL;
 391}
 392
 393#endif   /* __SCLP_H__ */
 394
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