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/asm-extable.h> 15 #include <asm/sclp.h> 16 #include <asm/ebcdic.h> 17 #include <asm/asm.h> 18 19 /* maximum number of pages concerning our own memory management */ 20 #define MAX_KMEM_PAGES (sizeof(unsigned long) << 3) 21 #define SCLP_CONSOLE_PAGES 6 22 23 #define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T))) 24 25 #define EVTYP_OPCMD 0x01 26 #define EVTYP_MSG 0x02 27 #define EVTYP_CONFMGMDATA 0x04 28 #define EVTYP_DIAG_TEST 0x07 29 #define EVTYP_STATECHANGE 0x08 30 #define EVTYP_PMSGCMD 0x09 31 #define EVTYP_ASYNC 0x0A 32 #define EVTYP_CTLPROGIDENT 0x0B 33 #define EVTYP_STORE_DATA 0x0C 34 #define EVTYP_ERRNOTIFY 0x18 35 #define EVTYP_VT220MSG 0x1A 36 #define EVTYP_SDIAS 0x1C 37 #define EVTYP_SIGQUIESCE 0x1D 38 #define EVTYP_OCF 0x1E 39 40 #define EVTYP_OPCMD_MASK SCLP_EVTYP_MASK(EVTYP_OPCMD) 41 #define EVTYP_MSG_MASK SCLP_EVTYP_MASK(EVTYP_MSG) 42 #define EVTYP_CONFMGMDATA_MASK SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA) 43 #define EVTYP_DIAG_TEST_MASK SCLP_EVTYP_MASK(EVTYP_DIAG_TEST) 44 #define EVTYP_STATECHANGE_MASK SCLP_EVTYP_MASK(EVTYP_STATECHANGE) 45 #define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD) 46 #define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC) 47 #define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT) 48 #define EVTYP_STORE_DATA_MASK SCLP_EVTYP_MASK(EVTYP_STORE_DATA) 49 #define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY) 50 #define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG) 51 #define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS) 52 #define EVTYP_SIGQUIESCE_MASK SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE) 53 #define EVTYP_OCF_MASK SCLP_EVTYP_MASK(EVTYP_OCF) 54 55 #define GNRLMSGFLGS_DOM 0x8000 56 #define GNRLMSGFLGS_SNDALRM 0x4000 57 #define GNRLMSGFLGS_HOLDMSG 0x2000 58 59 #define LNTPFLGS_CNTLTEXT 0x8000 60 #define LNTPFLGS_LABELTEXT 0x4000 61 #define LNTPFLGS_DATATEXT 0x2000 62 #define LNTPFLGS_ENDTEXT 0x1000 63 #define LNTPFLGS_PROMPTTEXT 0x0800 64 65 typedef unsigned int sclp_cmdw_t; 66 67 #define SCLP_CMDW_READ_CPU_INFO 0x00010001 68 #define SCLP_CMDW_READ_SCP_INFO 0x00020001 69 #define SCLP_CMDW_READ_STORAGE_INFO 0x00040001 70 #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 71 #define SCLP_CMDW_READ_EVENT_DATA 0x00770005 72 #define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005 73 #define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005 74 75 #define GDS_ID_MDSMU 0x1310 76 #define GDS_ID_MDSROUTEINFO 0x1311 77 #define GDS_ID_AGUNWRKCORR 0x1549 78 #define GDS_ID_SNACONDREPORT 0x1532 79 #define GDS_ID_CPMSU 0x1212 80 #define GDS_ID_ROUTTARGINSTR 0x154D 81 #define GDS_ID_OPREQ 0x8070 82 #define GDS_ID_TEXTCMD 0x1320 83 84 #define GDS_KEY_SELFDEFTEXTMSG 0x31 85 86 typedef u64 sccb_mask_t; 87 88 struct init_sccb { 89 struct sccb_header header; 90 u16 _reserved; 91 u16 mask_length; 92 u8 masks[4 * 1021]; /* variable length */ 93 /* 94 * u8 receive_mask[mask_length]; 95 * u8 send_mask[mask_length]; 96 * u8 sclp_receive_mask[mask_length]; 97 * u8 sclp_send_mask[mask_length]; 98 */ 99 } __attribute__((packed)); 100 101 #define SCLP_MASK_SIZE_COMPAT 4 102 103 static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i) 104 { 105 sccb_mask_t res = 0; 106 107 memcpy(&res, masks + i * len, min(sizeof(res), len)); 108 return res; 109 } 110 111 static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val) 112 { 113 memset(masks + i * len, 0, len); 114 memcpy(masks + i * len, &val, min(sizeof(val), len)); 115 } 116 117 #define sccb_get_generic_mask(sccb, i) \ 118 ({ \ 119 __typeof__(sccb) __sccb = sccb; \ 120 \ 121 sccb_get_mask(__sccb->masks, __sccb->mask_length, i); \ 122 }) 123 #define sccb_get_recv_mask(sccb) sccb_get_generic_mask(sccb, 0) 124 #define sccb_get_send_mask(sccb) sccb_get_generic_mask(sccb, 1) 125 #define sccb_get_sclp_recv_mask(sccb) sccb_get_generic_mask(sccb, 2) 126 #define sccb_get_sclp_send_mask(sccb) sccb_get_generic_mask(sccb, 3) 127 128 #define sccb_set_generic_mask(sccb, i, val) \ 129 ({ \ 130 __typeof__(sccb) __sccb = sccb; \ 131 \ 132 sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val); \ 133 }) 134 #define sccb_set_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 0, val) 135 #define sccb_set_send_mask(sccb, val) sccb_set_generic_mask(sccb, 1, val) 136 #define sccb_set_sclp_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 2, val) 137 #define sccb_set_sclp_send_mask(sccb, val) sccb_set_generic_mask(sccb, 3, val) 138 139 struct read_cpu_info_sccb { 140 struct sccb_header header; 141 u16 nr_configured; 142 u16 offset_configured; 143 u16 nr_standby; 144 u16 offset_standby; 145 /* 146 * Without ext sccb, struct size is PAGE_SIZE. 147 * With ext sccb, struct size is EXT_SCCB_READ_CPU. 148 */ 149 u8 reserved[]; 150 } __attribute__((packed, aligned(PAGE_SIZE))); 151 152 struct read_info_sccb { 153 struct sccb_header header; /* 0-7 */ 154 u16 rnmax; /* 8-9 */ 155 u8 rnsize; /* 10 */ 156 u8 _pad_11[16 - 11]; /* 11-15 */ 157 u16 ncpurl; /* 16-17 */ 158 u16 cpuoff; /* 18-19 */ 159 u8 _pad_20[24 - 20]; /* 20-23 */ 160 u8 loadparm[8]; /* 24-31 */ 161 u8 _pad_32[42 - 32]; /* 32-41 */ 162 u8 fac42; /* 42 */ 163 u8 fac43; /* 43 */ 164 u8 _pad_44[48 - 44]; /* 44-47 */ 165 u64 facilities; /* 48-55 */ 166 u8 _pad_56[66 - 56]; /* 56-65 */ 167 u8 fac66; /* 66 */ 168 u8 _pad_67[76 - 67]; /* 67-83 */ 169 u32 ibc; /* 76-79 */ 170 u8 _pad80[84 - 80]; /* 80-83 */ 171 u8 fac84; /* 84 */ 172 u8 fac85; /* 85 */ 173 u8 _pad_86[91 - 86]; /* 86-90 */ 174 u8 fac91; /* 91 */ 175 u8 _pad_92[98 - 92]; /* 92-97 */ 176 u8 fac98; /* 98 */ 177 u8 hamaxpow; /* 99 */ 178 u32 rnsize2; /* 100-103 */ 179 u64 rnmax2; /* 104-111 */ 180 u32 hsa_size; /* 112-115 */ 181 u8 fac116; /* 116 */ 182 u8 fac117; /* 117 */ 183 u8 fac118; /* 118 */ 184 u8 fac119; /* 119 */ 185 u16 hcpua; /* 120-121 */ 186 u8 _pad_122[124 - 122]; /* 122-123 */ 187 u32 hmfai; /* 124-127 */ 188 u8 _pad_128[134 - 128]; /* 128-133 */ 189 u8 byte_134; /* 134 */ 190 u8 cpudirq; /* 135 */ 191 u16 cbl; /* 136-137 */ 192 u8 byte_138; /* 138 */ 193 u8 byte_139; /* 139 */ 194 u8 _pad_140[EXT_SCCB_READ_SCP - 140]; 195 } __packed __aligned(PAGE_SIZE); 196 197 struct read_storage_sccb { 198 struct sccb_header header; 199 u16 max_id; 200 u16 assigned; 201 u16 standby; 202 u16 :16; 203 u32 entries[]; 204 } __packed; 205 206 static inline void sclp_fill_core_info(struct sclp_core_info *info, 207 struct read_cpu_info_sccb *sccb) 208 { 209 char *page = (char *) sccb; 210 211 memset(info, 0, sizeof(*info)); 212 info->configured = sccb->nr_configured; 213 info->standby = sccb->nr_standby; 214 info->combined = sccb->nr_configured + sccb->nr_standby; 215 memcpy(&info->core, page + sccb->offset_configured, 216 info->combined * sizeof(struct sclp_core_entry)); 217 } 218 219 #define SCLP_HAS_CHP_INFO (sclp.facilities & 0x8000000000000000ULL) 220 #define SCLP_HAS_CHP_RECONFIG (sclp.facilities & 0x2000000000000000ULL) 221 #define SCLP_HAS_CPU_INFO (sclp.facilities & 0x0800000000000000ULL) 222 #define SCLP_HAS_CPU_RECONFIG (sclp.facilities & 0x0400000000000000ULL) 223 #define SCLP_HAS_PCI_RECONFIG (sclp.facilities & 0x0000000040000000ULL) 224 #define SCLP_HAS_AP_RECONFIG (sclp.facilities & 0x0000000100000000ULL) 225 226 struct gds_subvector { 227 u8 length; 228 u8 key; 229 } __attribute__((packed)); 230 231 struct gds_vector { 232 u16 length; 233 u16 gds_id; 234 } __attribute__((packed)); 235 236 struct sclp_req { 237 struct list_head list; /* list_head for request queueing. */ 238 sclp_cmdw_t command; /* sclp command to execute */ 239 void *sccb; /* pointer to the sccb to execute */ 240 char status; /* status of this request */ 241 int start_count; /* number of SVCs done for this req */ 242 /* Callback that is called after reaching final status. */ 243 void (*callback)(struct sclp_req *, void *data); 244 void *callback_data; 245 int queue_timeout; /* request queue timeout (sec), set by 246 caller of sclp_add_request(), if 247 needed */ 248 /* Internal fields */ 249 unsigned long queue_expires; /* request queue timeout (jiffies) */ 250 }; 251 252 #define SCLP_REQ_FILLED 0x00 /* request is ready to be processed */ 253 #define SCLP_REQ_QUEUED 0x01 /* request is queued to be processed */ 254 #define SCLP_REQ_RUNNING 0x02 /* request is currently running */ 255 #define SCLP_REQ_DONE 0x03 /* request is completed successfully */ 256 #define SCLP_REQ_FAILED 0x05 /* request is finally failed */ 257 #define SCLP_REQ_QUEUED_TIMEOUT 0x06 /* request on queue timed out */ 258 259 #define SCLP_QUEUE_INTERVAL 5 /* timeout interval for request queue */ 260 261 /* function pointers that a high level driver has to use for registration */ 262 /* of some routines it wants to be called from the low level driver */ 263 struct sclp_register { 264 struct list_head list; 265 /* User wants to receive: */ 266 sccb_mask_t receive_mask; 267 /* User wants to send: */ 268 sccb_mask_t send_mask; 269 /* H/W can receive: */ 270 sccb_mask_t sclp_receive_mask; 271 /* H/W can send: */ 272 sccb_mask_t sclp_send_mask; 273 /* called if event type availability changes */ 274 void (*state_change_fn)(struct sclp_register *); 275 /* called for events in cp_receive_mask/sclp_receive_mask */ 276 void (*receiver_fn)(struct evbuf_header *); 277 }; 278 279 /* externals from sclp.c */ 280 int sclp_add_request(struct sclp_req *req); 281 void sclp_sync_wait(void); 282 int sclp_register(struct sclp_register *reg); 283 void sclp_unregister(struct sclp_register *reg); 284 int sclp_remove_processed(struct sccb_header *sccb); 285 int sclp_deactivate(void); 286 int sclp_reactivate(void); 287 int sclp_sync_request(sclp_cmdw_t command, void *sccb); 288 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout); 289 int sclp_sdias_init(void); 290 291 enum { 292 sclp_init_state_uninitialized, 293 sclp_init_state_initializing, 294 sclp_init_state_initialized 295 }; 296 297 extern int sclp_init_state; 298 extern int sclp_console_pages; 299 extern bool sclp_console_drop; 300 extern unsigned long sclp_console_full; 301 extern bool sclp_mask_compat_mode; 302 303 void sclp_early_wait_irq(void); 304 int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb); 305 unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb); 306 unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb); 307 int sclp_early_set_event_mask(struct init_sccb *sccb, 308 sccb_mask_t receive_mask, 309 sccb_mask_t send_mask); 310 struct read_info_sccb * __init sclp_early_get_info(void); 311 312 /* useful inlines */ 313 314 /* Perform service call. Return 0 on success, non-zero otherwise. */ 315 static inline int sclp_service_call(sclp_cmdw_t command, void *sccb) 316 { 317 int cc, exception; 318 319 exception = 1; 320 asm volatile( 321 "0: .insn rre,0xb2200000,%[cmd],%[sccb]\n" /* servc */ 322 "1: lhi %[exc],0\n" 323 "2:\n" 324 CC_IPM(cc) 325 EX_TABLE(0b, 2b) 326 EX_TABLE(1b, 2b) 327 : CC_OUT(cc, cc), [exc] "+d" (exception) 328 : [cmd] "d" (command), [sccb] "a" (__pa(sccb)) 329 : CC_CLOBBER_LIST("memory")); 330 if (exception) 331 return -EINVAL; 332 cc = CC_TRANSFORM(cc); 333 if (cc == 3) 334 return -EIO; 335 if (cc == 2) 336 return -EBUSY; 337 return 0; 338 } 339 340 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */ 341 /* translate single character from ASCII to EBCDIC */ 342 static inline unsigned char 343 sclp_ascebc(unsigned char ch) 344 { 345 return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch]; 346 } 347 348 /* translate string from EBCDIC to ASCII */ 349 static inline void 350 sclp_ebcasc_str(char *str, int nr) 351 { 352 (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr); 353 } 354 355 /* translate string from ASCII to EBCDIC */ 356 static inline void 357 sclp_ascebc_str(char *str, int nr) 358 { 359 (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr); 360 } 361 362 static inline struct gds_vector * 363 sclp_find_gds_vector(void *start, void *end, u16 id) 364 { 365 struct gds_vector *v; 366 367 for (v = start; (void *) v < end; v = (void *) v + v->length) 368 if (v->gds_id == id) 369 return v; 370 return NULL; 371 } 372 373 static inline struct gds_subvector * 374 sclp_find_gds_subvector(void *start, void *end, u8 key) 375 { 376 struct gds_subvector *sv; 377 378 for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length) 379 if (sv->key == key) 380 return sv; 381 return NULL; 382 } 383 384 #endif /* __SCLP_H__ */ 385