drivers/s390/char/sclp.h

   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
  63 typedef 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
  84 enum sclp_pm_event {
  85         SCLP_PM_EVENT_FREEZE,
  86         SCLP_PM_EVENT_THAW,
  87         SCLP_PM_EVENT_RESTORE,
  88 };
  89
  90 #define SCLP_PANIC_PRIO         1
  91 #define SCLP_PANIC_PRIO_CLIENT  0
  92
  93 typedef u64 sccb_mask_t;
  94
  95 struct sccb_header {
  96         u16     length;
  97         u8      function_code;
  98         u8      control_mask[3];
  99         u16     response_code;
 100 } __attribute__((packed));
 101
 102 struct init_sccb {
 103         struct sccb_header header;
 104         u16 _reserved;
 105         u16 mask_length;
 106         u8 masks[4 * 1021];     /* variable length */
 107         /*
 108          * u8 receive_mask[mask_length];
 109          * u8 send_mask[mask_length];
 110          * u8 sclp_receive_mask[mask_length];
 111          * u8 sclp_send_mask[mask_length];
 112          */
 113 } __attribute__((packed));
 114
 115 #define SCLP_MASK_SIZE_COMPAT 4
 116
 117 static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i)
 118 {
 119         sccb_mask_t res = 0;
 120
 121         memcpy(&res, masks + i * len, min(sizeof(res), len));
 122         return res;
 123 }
 124
 125 static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val)
 126 {
 127         memset(masks + i * len, 0, len);
 128         memcpy(masks + i * len, &val, min(sizeof(val), len));
 129 }
 130
 131 #define sccb_get_generic_mask(sccb, i)                                  \
 132 ({                                                                      \
 133         __typeof__(sccb) __sccb = sccb;                                 \
 134                                                                         \
 135         sccb_get_mask(__sccb->masks, __sccb->mask_length, i);           \
 136 })
 137 #define sccb_get_recv_mask(sccb)        sccb_get_generic_mask(sccb, 0)
 138 #define sccb_get_send_mask(sccb)        sccb_get_generic_mask(sccb, 1)
 139 #define sccb_get_sclp_recv_mask(sccb)   sccb_get_generic_mask(sccb, 2)
 140 #define sccb_get_sclp_send_mask(sccb)   sccb_get_generic_mask(sccb, 3)
 141
 142 #define sccb_set_generic_mask(sccb, i, val)                             \
 143 ({                                                                      \
 144         __typeof__(sccb) __sccb = sccb;                                 \
 145                                                                         \
 146         sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val);      \
 147 })
 148 #define sccb_set_recv_mask(sccb, val)       sccb_set_generic_mask(sccb, 0, val)
 149 #define sccb_set_send_mask(sccb, val)       sccb_set_generic_mask(sccb, 1, val)
 150 #define sccb_set_sclp_recv_mask(sccb, val)  sccb_set_generic_mask(sccb, 2, val)
 151 #define sccb_set_sclp_send_mask(sccb, val)  sccb_set_generic_mask(sccb, 3, val)
 152
 153 struct read_cpu_info_sccb {
 154         struct  sccb_header header;
 155         u16     nr_configured;
 156         u16     offset_configured;
 157         u16     nr_standby;
 158         u16     offset_standby;
 159         u8      reserved[4096 - 16];
 160 } __attribute__((packed, aligned(PAGE_SIZE)));
 161
 162 struct read_info_sccb {
 163         struct  sccb_header header;     /* 0-7 */
 164         u16     rnmax;                  /* 8-9 */
 165         u8      rnsize;                 /* 10 */
 166         u8      _pad_11[16 - 11];       /* 11-15 */
 167         u16     ncpurl;                 /* 16-17 */
 168         u16     cpuoff;                 /* 18-19 */
 169         u8      _pad_20[24 - 20];       /* 20-23 */
 170         u8      loadparm[8];            /* 24-31 */
 171         u8      _pad_32[42 - 32];       /* 32-41 */
 172         u8      fac42;                  /* 42 */
 173         u8      fac43;                  /* 43 */
 174         u8      _pad_44[48 - 44];       /* 44-47 */
 175         u64     facilities;             /* 48-55 */
 176         u8      _pad_56[66 - 56];       /* 56-65 */
 177         u8      fac66;                  /* 66 */
 178         u8      _pad_67[76 - 67];       /* 67-83 */
 179         u32     ibc;                    /* 76-79 */
 180         u8      _pad80[84 - 80];        /* 80-83 */
 181         u8      fac84;                  /* 84 */
 182         u8      fac85;                  /* 85 */
 183         u8      _pad_86[91 - 86];       /* 86-90 */
 184         u8      fac91;                  /* 91 */
 185         u8      _pad_92[98 - 92];       /* 92-97 */
 186         u8      fac98;                  /* 98 */
 187         u8      hamaxpow;               /* 99 */
 188         u32     rnsize2;                /* 100-103 */
 189         u64     rnmax2;                 /* 104-111 */
 190         u32     hsa_size;               /* 112-115 */
 191         u8      fac116;                 /* 116 */
 192         u8      fac117;                 /* 117 */
 193         u8      fac118;                 /* 118 */
 194         u8      fac119;                 /* 119 */
 195         u16     hcpua;                  /* 120-121 */
 196         u8      _pad_122[124 - 122];    /* 122-123 */
 197         u32     hmfai;                  /* 124-127 */
 198         u8      _pad_128[134 - 128];    /* 128-133 */
 199         u8      byte_134;                       /* 134 */
 200         u8      cpudirq;                /* 135 */
 201         u16     cbl;                    /* 136-137 */
 202         u8      _pad_138[4096 - 138];   /* 138-4095 */
 203 } __packed __aligned(PAGE_SIZE);
 204
 205 struct read_storage_sccb {
 206         struct sccb_header header;
 207         u16 max_id;
 208         u16 assigned;
 209         u16 standby;
 210         u16 :16;
 211         u32 entries[0];
 212 } __packed;
 213
 214 static inline void sclp_fill_core_info(struct sclp_core_info *info,
 215                                        struct read_cpu_info_sccb *sccb)
 216 {
 217         char *page = (char *) sccb;
 218
 219         memset(info, 0, sizeof(*info));
 220         info->configured = sccb->nr_configured;
 221         info->standby = sccb->nr_standby;
 222         info->combined = sccb->nr_configured + sccb->nr_standby;
 223         memcpy(&info->core, page + sccb->offset_configured,
 224                info->combined * sizeof(struct sclp_core_entry));
 225 }
 226
 227 #define SCLP_HAS_CHP_INFO       (sclp.facilities & 0x8000000000000000ULL)
 228 #define SCLP_HAS_CHP_RECONFIG   (sclp.facilities & 0x2000000000000000ULL)
 229 #define SCLP_HAS_CPU_INFO       (sclp.facilities & 0x0800000000000000ULL)
 230 #define SCLP_HAS_CPU_RECONFIG   (sclp.facilities & 0x0400000000000000ULL)
 231 #define SCLP_HAS_PCI_RECONFIG   (sclp.facilities & 0x0000000040000000ULL)
 232
 233
 234 struct gds_subvector {
 235         u8      length;
 236         u8      key;
 237 } __attribute__((packed));
 238
 239 struct gds_vector {
 240         u16     length;
 241         u16     gds_id;
 242 } __attribute__((packed));
 243
 244 struct evbuf_header {
 245         u16     length;
 246         u8      type;
 247         u8      flags;
 248         u16     _reserved;
 249 } __attribute__((packed));
 250
 251 struct sclp_req {
 252         struct list_head list;          /* list_head for request queueing. */
 253         sclp_cmdw_t command;            /* sclp command to execute */
 254         void    *sccb;                  /* pointer to the sccb to execute */
 255         char    status;                 /* status of this request */
 256         int     start_count;            /* number of SVCs done for this req */
 257         /* Callback that is called after reaching final status. */
 258         void (*callback)(struct sclp_req *, void *data);
 259         void *callback_data;
 260         int queue_timeout;              /* request queue timeout (sec), set by
 261                                            caller of sclp_add_request(), if
 262                                            needed */
 263         /* Internal fields */
 264         unsigned long queue_expires;    /* request queue timeout (jiffies) */
 265 };
 266
 267 #define SCLP_REQ_FILLED   0x00  /* request is ready to be processed */
 268 #define SCLP_REQ_QUEUED   0x01  /* request is queued to be processed */
 269 #define SCLP_REQ_RUNNING  0x02  /* request is currently running */
 270 #define SCLP_REQ_DONE     0x03  /* request is completed successfully */
 271 #define SCLP_REQ_FAILED   0x05  /* request is finally failed */
 272 #define SCLP_REQ_QUEUED_TIMEOUT 0x06    /* request on queue timed out */
 273
 274 #define SCLP_QUEUE_INTERVAL 5   /* timeout interval for request queue */
 275
 276 /* function pointers that a high level driver has to use for registration */
 277 /* of some routines it wants to be called from the low level driver */
 278 struct sclp_register {
 279         struct list_head list;
 280         /* User wants to receive: */
 281         sccb_mask_t receive_mask;
 282         /* User wants to send: */
 283         sccb_mask_t send_mask;
 284         /* H/W can receive: */
 285         sccb_mask_t sclp_receive_mask;
 286         /* H/W can send: */
 287         sccb_mask_t sclp_send_mask;
 288         /* called if event type availability changes */
 289         void (*state_change_fn)(struct sclp_register *);
 290         /* called for events in cp_receive_mask/sclp_receive_mask */
 291         void (*receiver_fn)(struct evbuf_header *);
 292         /* called for power management events */
 293         void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
 294         /* pm event posted flag */
 295         int pm_event_posted;
 296 };
 297
 298 /* externals from sclp.c */
 299 int sclp_add_request(struct sclp_req *req);
 300 void sclp_sync_wait(void);
 301 int sclp_register(struct sclp_register *reg);
 302 void sclp_unregister(struct sclp_register *reg);
 303 int sclp_remove_processed(struct sccb_header *sccb);
 304 int sclp_deactivate(void);
 305 int sclp_reactivate(void);
 306 int sclp_sync_request(sclp_cmdw_t command, void *sccb);
 307 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
 308
 309 int sclp_sdias_init(void);
 310 void sclp_sdias_exit(void);
 311
 312 enum {
 313         sclp_init_state_uninitialized,
 314         sclp_init_state_initializing,
 315         sclp_init_state_initialized
 316 };
 317
 318 extern int sclp_init_state;
 319 extern int sclp_console_pages;
 320 extern int sclp_console_drop;
 321 extern unsigned long sclp_console_full;
 322 extern bool sclp_mask_compat_mode;
 323
 324 extern char *sclp_early_sccb;
 325
 326 void sclp_early_wait_irq(void);
 327 int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
 328 unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
 329 unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
 330 int sclp_early_set_event_mask(struct init_sccb *sccb,
 331                               sccb_mask_t receive_mask,
 332                               sccb_mask_t send_mask);
 333 int sclp_early_get_info(struct read_info_sccb *info);
 334
 335 /* useful inlines */
 336
 337 /* Perform service call. Return 0 on success, non-zero otherwise. */
 338 static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
 339 {
 340         int cc = 4; /* Initialize for program check handling */
 341
 342         asm volatile(
 343                 "0:     .insn   rre,0xb2200000,%1,%2\n"  /* servc %1,%2 */
 344                 "1:     ipm     %0\n"
 345                 "       srl     %0,28\n"
 346                 "2:\n"
 347                 EX_TABLE(0b, 2b)
 348                 EX_TABLE(1b, 2b)
 349                 : "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
 350                 : "cc", "memory");
 351         if (cc == 4)
 352                 return -EINVAL;
 353         if (cc == 3)
 354                 return -EIO;
 355         if (cc == 2)
 356                 return -EBUSY;
 357         return 0;
 358 }
 359
 360 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
 361 /* translate single character from ASCII to EBCDIC */
 362 static inline unsigned char
 363 sclp_ascebc(unsigned char ch)
 364 {
 365         return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
 366 }
 367
 368 /* translate string from EBCDIC to ASCII */
 369 static inline void
 370 sclp_ebcasc_str(char *str, int nr)
 371 {
 372         (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
 373 }
 374
 375 /* translate string from ASCII to EBCDIC */
 376 static inline void
 377 sclp_ascebc_str(char *str, int nr)
 378 {
 379         (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
 380 }
 381
 382 static inline struct gds_vector *
 383 sclp_find_gds_vector(void *start, void *end, u16 id)
 384 {
 385         struct gds_vector *v;
 386
 387         for (v = start; (void *) v < end; v = (void *) v + v->length)
 388                 if (v->gds_id == id)
 389                         return v;
 390         return NULL;
 391 }
 392
 393 static inline struct gds_subvector *
 394 sclp_find_gds_subvector(void *start, void *end, u8 key)
 395 {
 396         struct gds_subvector *sv;
 397
 398         for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
 399                 if (sv->key == key)
 400                         return sv;
 401         return NULL;
 402 }
 403
 404 #endif   /* __SCLP_H__ */