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