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 typedef u64 sccb_mask_t; 85 86 struct sccb_header { 87 u16 length; 88 u8 function_code; 89 u8 control_mask[3]; 90 u16 response_code; 91 } __attribute__((packed)); 92 93 struct 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 4 107 108 static 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 } 115 116 static 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) 143 144 struct 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))); 156 157 struct 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); 199 200 struct 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; 208 209 static 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) 228 229 struct gds_subvector { 230 u8 length; 231 u8 key; 232 } __attribute__((packed)); 233 234 struct gds_vector { 235 u16 length; 236 u16 gds_id; 237 } __attribute__((packed)); 238 239 struct evbuf_header { 240 u16 length; 241 u8 type; 242 u8 flags; 243 u16 _reserved; 244 } __attribute__((packed)); 245 246 struct 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 */ 273 struct 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 */ 290 int sclp_add_request(struct sclp_req *req); 291 void sclp_sync_wait(void); 292 int sclp_register(struct sclp_register *reg); 293 void sclp_unregister(struct sclp_register *reg); 294 int sclp_remove_processed(struct sccb_header *sccb); 295 int sclp_deactivate(void); 296 int sclp_reactivate(void); 297 int sclp_sync_request(sclp_cmdw_t command, void *sccb); 298 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout); 299 int sclp_sdias_init(void); 300 301 enum { 302 sclp_init_state_uninitialized, 303 sclp_init_state_initializing, 304 sclp_init_state_initialized 305 }; 306 307 extern int sclp_init_state; 308 extern int sclp_console_pages; 309 extern int sclp_console_drop; 310 extern unsigned long sclp_console_full; 311 extern bool sclp_mask_compat_mode; 312 313 void sclp_early_wait_irq(void); 314 int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb); 315 unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb); 316 unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb); 317 int sclp_early_set_event_mask(struct init_sccb *sccb, 318 sccb_mask_t receive_mask, 319 sccb_mask_t send_mask); 320 struct read_info_sccb * __init sclp_early_get_info(void); 321 322 /* useful inlines */ 323 324 /* Perform service call. Return 0 on success, non-zero otherwise. */ 325 static inline int sclp_service_call(sclp_cmdw_t command, void *sccb) 326 { 327 int cc = 4; /* Initialize for program check handling */ 328 329 asm volatile( 330 "0: .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */ 331 "1: ipm %0\n" 332 " srl %0,28\n" 333 "2:\n" 334 EX_TABLE(0b, 2b) 335 EX_TABLE(1b, 2b) 336 : "+&d" (cc) : "d" (command), "a" (__pa(sccb)) 337 : "cc", "memory"); 338 if (cc == 4) 339 return -EINVAL; 340 if (cc == 3) 341 return -EIO; 342 if (cc == 2) 343 return -EBUSY; 344 return 0; 345 } 346 347 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */ 348 /* translate single character from ASCII to EBCDIC */ 349 static inline unsigned char 350 sclp_ascebc(unsigned char ch) 351 { 352 return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch]; 353 } 354 355 /* translate string from EBCDIC to ASCII */ 356 static inline void 357 sclp_ebcasc_str(char *str, int nr) 358 { 359 (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr); 360 } 361 362 /* translate string from ASCII to EBCDIC */ 363 static inline void 364 sclp_ascebc_str(char *str, int nr) 365 { 366 (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr); 367 } 368 369 static inline struct gds_vector * 370 sclp_find_gds_vector(void *start, void *end, u16 id) 371 { 372 struct gds_vector *v; 373 374 for (v = start; (void *) v < end; v = (void *) v + v->length) 375 if (v->gds_id == id) 376 return v; 377 return NULL; 378 } 379 380 static inline struct gds_subvector * 381 sclp_find_gds_subvector(void *start, void *end, u8 key) 382 { 383 struct gds_subvector *sv; 384 385 for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length) 386 if (sv->key == key) 387 return sv; 388 return NULL; 389 } 390 391 #endif /* __SCLP_H__ */ 392