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)      (1U << (32 - (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_ERRNOTIFY         0x18
  32 #define EVTYP_VT220MSG          0x1A
  33 #define EVTYP_SDIAS             0x1C
  34 #define EVTYP_SIGQUIESCE        0x1D
  35 #define EVTYP_OCF               0x1E
  36
  37 #define EVTYP_OPCMD_MASK        SCLP_EVTYP_MASK(EVTYP_OPCMD)
  38 #define EVTYP_MSG_MASK          SCLP_EVTYP_MASK(EVTYP_MSG)
  39 #define EVTYP_CONFMGMDATA_MASK  SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
  40 #define EVTYP_DIAG_TEST_MASK    SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
  41 #define EVTYP_STATECHANGE_MASK  SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
  42 #define EVTYP_PMSGCMD_MASK      SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
  43 #define EVTYP_ASYNC_MASK        SCLP_EVTYP_MASK(EVTYP_ASYNC)
  44 #define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
  45 #define EVTYP_ERRNOTIFY_MASK    SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
  46 #define EVTYP_VT220MSG_MASK     SCLP_EVTYP_MASK(EVTYP_VT220MSG)
  47 #define EVTYP_SDIAS_MASK        SCLP_EVTYP_MASK(EVTYP_SDIAS)
  48 #define EVTYP_SIGQUIESCE_MASK   SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
  49 #define EVTYP_OCF_MASK          SCLP_EVTYP_MASK(EVTYP_OCF)
  50
  51 #define GNRLMSGFLGS_DOM         0x8000
  52 #define GNRLMSGFLGS_SNDALRM     0x4000
  53 #define GNRLMSGFLGS_HOLDMSG     0x2000
  54
  55 #define LNTPFLGS_CNTLTEXT       0x8000
  56 #define LNTPFLGS_LABELTEXT      0x4000
  57 #define LNTPFLGS_DATATEXT       0x2000
  58 #define LNTPFLGS_ENDTEXT        0x1000
  59 #define LNTPFLGS_PROMPTTEXT     0x0800
  60
  61 typedef unsigned int sclp_cmdw_t;
  62
  63 #define SCLP_CMDW_READ_CPU_INFO         0x00010001
  64 #define SCLP_CMDW_READ_EVENT_DATA       0x00770005
  65 #define SCLP_CMDW_WRITE_EVENT_DATA      0x00760005
  66 #define SCLP_CMDW_WRITE_EVENT_MASK      0x00780005
  67
  68 #define GDS_ID_MDSMU            0x1310
  69 #define GDS_ID_MDSROUTEINFO     0x1311
  70 #define GDS_ID_AGUNWRKCORR      0x1549
  71 #define GDS_ID_SNACONDREPORT    0x1532
  72 #define GDS_ID_CPMSU            0x1212
  73 #define GDS_ID_ROUTTARGINSTR    0x154D
  74 #define GDS_ID_OPREQ            0x8070
  75 #define GDS_ID_TEXTCMD          0x1320
  76
  77 #define GDS_KEY_SELFDEFTEXTMSG  0x31
  78
  79 enum sclp_pm_event {
  80         SCLP_PM_EVENT_FREEZE,
  81         SCLP_PM_EVENT_THAW,
  82         SCLP_PM_EVENT_RESTORE,
  83 };
  84
  85 #define SCLP_PANIC_PRIO         1
  86 #define SCLP_PANIC_PRIO_CLIENT  0
  87
  88 typedef u32 sccb_mask_t;        /* ATTENTION: assumes 32bit mask !!! */
  89
  90 struct sccb_header {
  91         u16     length;
  92         u8      function_code;
  93         u8      control_mask[3];
  94         u16     response_code;
  95 } __attribute__((packed));
  96
  97 struct init_sccb {
  98         struct sccb_header header;
  99         u16 _reserved;
 100         u16 mask_length;
 101         sccb_mask_t receive_mask;
 102         sccb_mask_t send_mask;
 103         sccb_mask_t sclp_receive_mask;
 104         sccb_mask_t sclp_send_mask;
 105 } __attribute__((packed));
 106
 107 struct read_cpu_info_sccb {
 108         struct  sccb_header header;
 109         u16     nr_configured;
 110         u16     offset_configured;
 111         u16     nr_standby;
 112         u16     offset_standby;
 113         u8      reserved[4096 - 16];
 114 } __attribute__((packed, aligned(PAGE_SIZE)));
 115
 116 static inline void sclp_fill_core_info(struct sclp_core_info *info,
 117                                        struct read_cpu_info_sccb *sccb)
 118 {
 119         char *page = (char *) sccb;
 120
 121         memset(info, 0, sizeof(*info));
 122         info->configured = sccb->nr_configured;
 123         info->standby = sccb->nr_standby;
 124         info->combined = sccb->nr_configured + sccb->nr_standby;
 125         memcpy(&info->core, page + sccb->offset_configured,
 126                info->combined * sizeof(struct sclp_core_entry));
 127 }
 128
 129 #define SCLP_HAS_CHP_INFO       (sclp.facilities & 0x8000000000000000ULL)
 130 #define SCLP_HAS_CHP_RECONFIG   (sclp.facilities & 0x2000000000000000ULL)
 131 #define SCLP_HAS_CPU_INFO       (sclp.facilities & 0x0800000000000000ULL)
 132 #define SCLP_HAS_CPU_RECONFIG   (sclp.facilities & 0x0400000000000000ULL)
 133 #define SCLP_HAS_PCI_RECONFIG   (sclp.facilities & 0x0000000040000000ULL)
 134
 135
 136 struct gds_subvector {
 137         u8      length;
 138         u8      key;
 139 } __attribute__((packed));
 140
 141 struct gds_vector {
 142         u16     length;
 143         u16     gds_id;
 144 } __attribute__((packed));
 145
 146 struct evbuf_header {
 147         u16     length;
 148         u8      type;
 149         u8      flags;
 150         u16     _reserved;
 151 } __attribute__((packed));
 152
 153 struct sclp_req {
 154         struct list_head list;          /* list_head for request queueing. */
 155         sclp_cmdw_t command;            /* sclp command to execute */
 156         void    *sccb;                  /* pointer to the sccb to execute */
 157         char    status;                 /* status of this request */
 158         int     start_count;            /* number of SVCs done for this req */
 159         /* Callback that is called after reaching final status. */
 160         void (*callback)(struct sclp_req *, void *data);
 161         void *callback_data;
 162         int queue_timeout;              /* request queue timeout (sec), set by
 163                                            caller of sclp_add_request(), if
 164                                            needed */
 165         /* Internal fields */
 166         unsigned long queue_expires;    /* request queue timeout (jiffies) */
 167 };
 168
 169 #define SCLP_REQ_FILLED   0x00  /* request is ready to be processed */
 170 #define SCLP_REQ_QUEUED   0x01  /* request is queued to be processed */
 171 #define SCLP_REQ_RUNNING  0x02  /* request is currently running */
 172 #define SCLP_REQ_DONE     0x03  /* request is completed successfully */
 173 #define SCLP_REQ_FAILED   0x05  /* request is finally failed */
 174 #define SCLP_REQ_QUEUED_TIMEOUT 0x06    /* request on queue timed out */
 175
 176 #define SCLP_QUEUE_INTERVAL 5   /* timeout interval for request queue */
 177
 178 /* function pointers that a high level driver has to use for registration */
 179 /* of some routines it wants to be called from the low level driver */
 180 struct sclp_register {
 181         struct list_head list;
 182         /* User wants to receive: */
 183         sccb_mask_t receive_mask;
 184         /* User wants to send: */
 185         sccb_mask_t send_mask;
 186         /* H/W can receive: */
 187         sccb_mask_t sclp_receive_mask;
 188         /* H/W can send: */
 189         sccb_mask_t sclp_send_mask;
 190         /* called if event type availability changes */
 191         void (*state_change_fn)(struct sclp_register *);
 192         /* called for events in cp_receive_mask/sclp_receive_mask */
 193         void (*receiver_fn)(struct evbuf_header *);
 194         /* called for power management events */
 195         void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
 196         /* pm event posted flag */
 197         int pm_event_posted;
 198 };
 199
 200 /* externals from sclp.c */
 201 int sclp_add_request(struct sclp_req *req);
 202 void sclp_sync_wait(void);
 203 int sclp_register(struct sclp_register *reg);
 204 void sclp_unregister(struct sclp_register *reg);
 205 int sclp_remove_processed(struct sccb_header *sccb);
 206 int sclp_deactivate(void);
 207 int sclp_reactivate(void);
 208 int sclp_sync_request(sclp_cmdw_t command, void *sccb);
 209 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
 210
 211 int sclp_sdias_init(void);
 212 void sclp_sdias_exit(void);
 213
 214 enum {
 215         sclp_init_state_uninitialized,
 216         sclp_init_state_initializing,
 217         sclp_init_state_initialized
 218 };
 219
 220 extern int sclp_init_state;
 221 extern int sclp_console_pages;
 222 extern int sclp_console_drop;
 223 extern unsigned long sclp_console_full;
 224
 225 extern char sclp_early_sccb[PAGE_SIZE];
 226
 227 void sclp_early_wait_irq(void);
 228 int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
 229 unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
 230 int sclp_early_set_event_mask(struct init_sccb *sccb,
 231                               unsigned long receive_mask,
 232                               unsigned long send_mask);
 233
 234 /* useful inlines */
 235
 236 /* Perform service call. Return 0 on success, non-zero otherwise. */
 237 static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
 238 {
 239         int cc = 4; /* Initialize for program check handling */
 240
 241         asm volatile(
 242                 "0:     .insn   rre,0xb2200000,%1,%2\n"  /* servc %1,%2 */
 243                 "1:     ipm     %0\n"
 244                 "       srl     %0,28\n"
 245                 "2:\n"
 246                 EX_TABLE(0b, 2b)
 247                 EX_TABLE(1b, 2b)
 248                 : "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
 249                 : "cc", "memory");
 250         if (cc == 4)
 251                 return -EINVAL;
 252         if (cc == 3)
 253                 return -EIO;
 254         if (cc == 2)
 255                 return -EBUSY;
 256         return 0;
 257 }
 258
 259 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
 260 /* translate single character from ASCII to EBCDIC */
 261 static inline unsigned char
 262 sclp_ascebc(unsigned char ch)
 263 {
 264         return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
 265 }
 266
 267 /* translate string from EBCDIC to ASCII */
 268 static inline void
 269 sclp_ebcasc_str(unsigned char *str, int nr)
 270 {
 271         (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
 272 }
 273
 274 /* translate string from ASCII to EBCDIC */
 275 static inline void
 276 sclp_ascebc_str(unsigned char *str, int nr)
 277 {
 278         (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
 279 }
 280
 281 static inline struct gds_vector *
 282 sclp_find_gds_vector(void *start, void *end, u16 id)
 283 {
 284         struct gds_vector *v;
 285
 286         for (v = start; (void *) v < end; v = (void *) v + v->length)
 287                 if (v->gds_id == id)
 288                         return v;
 289         return NULL;
 290 }
 291
 292 static inline struct gds_subvector *
 293 sclp_find_gds_subvector(void *start, void *end, u8 key)
 294 {
 295         struct gds_subvector *sv;
 296
 297         for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
 298                 if (sv->key == key)
 299                         return sv;
 300         return NULL;
 301 }
 302
 303 #endif   /* __SCLP_H__ */