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/machine.h> 16 #include <asm/sclp.h> 17 #include <asm/ebcdic.h> 18 #include <asm/asm.h> 19 20 /* maximum number of pages concerning our own memory management */ 21 #define MAX_KMEM_PAGES (sizeof(unsigned long) << 3) 22 #define SCLP_CONSOLE_PAGES 6 23 24 #define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T))) 25 26 #define EVTYP_OPCMD 0x01 27 #define EVTYP_MSG 0x02 28 #define EVTYP_CONFMGMDATA 0x04 29 #define EVTYP_DIAG_TEST 0x07 30 #define EVTYP_STATECHANGE 0x08 31 #define EVTYP_PMSGCMD 0x09 32 #define EVTYP_ASYNC 0x0A 33 #define EVTYP_CTLPROGIDENT 0x0B 34 #define EVTYP_STORE_DATA 0x0C 35 #define EVTYP_ERRNOTIFY 0x18 36 #define EVTYP_VT220MSG 0x1A 37 #define EVTYP_SDIAS 0x1C 38 #define EVTYP_SIGQUIESCE 0x1D 39 #define EVTYP_OCF 0x1E 40 41 #define EVTYP_OPCMD_MASK SCLP_EVTYP_MASK(EVTYP_OPCMD) 42 #define EVTYP_MSG_MASK SCLP_EVTYP_MASK(EVTYP_MSG) 43 #define EVTYP_CONFMGMDATA_MASK SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA) 44 #define EVTYP_DIAG_TEST_MASK SCLP_EVTYP_MASK(EVTYP_DIAG_TEST) 45 #define EVTYP_STATECHANGE_MASK SCLP_EVTYP_MASK(EVTYP_STATECHANGE) 46 #define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD) 47 #define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC) 48 #define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT) 49 #define EVTYP_STORE_DATA_MASK SCLP_EVTYP_MASK(EVTYP_STORE_DATA) 50 #define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY) 51 #define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG) 52 #define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS) 53 #define EVTYP_SIGQUIESCE_MASK SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE) 54 #define EVTYP_OCF_MASK SCLP_EVTYP_MASK(EVTYP_OCF) 55 56 #define GNRLMSGFLGS_DOM 0x8000 57 #define GNRLMSGFLGS_SNDALRM 0x4000 58 #define GNRLMSGFLGS_HOLDMSG 0x2000 59 60 #define LNTPFLGS_CNTLTEXT 0x8000 61 #define LNTPFLGS_LABELTEXT 0x4000 62 #define LNTPFLGS_DATATEXT 0x2000 63 #define LNTPFLGS_ENDTEXT 0x1000 64 #define LNTPFLGS_PROMPTTEXT 0x0800 65 66 typedef unsigned int sclp_cmdw_t; 67 68 #define SCLP_CMDW_READ_CPU_INFO 0x00010001 69 #define SCLP_CMDW_READ_SCP_INFO 0x00020001 70 #define SCLP_CMDW_READ_STORAGE_INFO 0x00040001 71 #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 72 #define SCLP_CMDW_READ_EVENT_DATA 0x00770005 73 #define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005 74 #define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005 75 76 #define GDS_ID_MDSMU 0x1310 77 #define GDS_ID_MDSROUTEINFO 0x1311 78 #define GDS_ID_AGUNWRKCORR 0x1549 79 #define GDS_ID_SNACONDREPORT 0x1532 80 #define GDS_ID_CPMSU 0x1212 81 #define GDS_ID_ROUTTARGINSTR 0x154D 82 #define GDS_ID_OPREQ 0x8070 83 #define GDS_ID_TEXTCMD 0x1320 84 85 #define GDS_KEY_SELFDEFTEXTMSG 0x31 86 87 typedef u64 sccb_mask_t; 88 89 struct init_sccb { 90 struct sccb_header header; 91 u16 _reserved; 92 u16 mask_length; 93 u8 masks[4 * 1021]; /* variable length */ 94 /* 95 * u8 receive_mask[mask_length]; 96 * u8 send_mask[mask_length]; 97 * u8 sclp_receive_mask[mask_length]; 98 * u8 sclp_send_mask[mask_length]; 99 */ 100 } __attribute__((packed)); 101 102 #define SCLP_MASK_SIZE_COMPAT 4 103 104 static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i) 105 { 106 sccb_mask_t res = 0; 107 108 memcpy(&res, masks + i * len, min(sizeof(res), len)); 109 return res; 110 } 111 112 static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val) 113 { 114 memset(masks + i * len, 0, len); 115 memcpy(masks + i * len, &val, min(sizeof(val), len)); 116 } 117 118 #define sccb_get_generic_mask(sccb, i) \ 119 ({ \ 120 __typeof__(sccb) __sccb = sccb; \ 121 \ 122 sccb_get_mask(__sccb->masks, __sccb->mask_length, i); \ 123 }) 124 #define sccb_get_recv_mask(sccb) sccb_get_generic_mask(sccb, 0) 125 #define sccb_get_send_mask(sccb) sccb_get_generic_mask(sccb, 1) 126 #define sccb_get_sclp_recv_mask(sccb) sccb_get_generic_mask(sccb, 2) 127 #define sccb_get_sclp_send_mask(sccb) sccb_get_generic_mask(sccb, 3) 128 129 #define sccb_set_generic_mask(sccb, i, val) \ 130 ({ \ 131 __typeof__(sccb) __sccb = sccb; \ 132 \ 133 sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val); \ 134 }) 135 #define sccb_set_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 0, val) 136 #define sccb_set_send_mask(sccb, val) sccb_set_generic_mask(sccb, 1, val) 137 #define sccb_set_sclp_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 2, val) 138 #define sccb_set_sclp_send_mask(sccb, val) sccb_set_generic_mask(sccb, 3, val) 139 140 struct read_cpu_info_sccb { 141 struct sccb_header header; 142 u16 nr_configured; 143 u16 offset_configured; 144 u16 nr_standby; 145 u16 offset_standby; 146 /* 147 * Without ext sccb, struct size is PAGE_SIZE. 148 * With ext sccb, struct size is EXT_SCCB_READ_CPU. 149 */ 150 u8 reserved[]; 151 } __attribute__((packed, aligned(PAGE_SIZE))); 152 153 struct read_info_sccb { 154 struct sccb_header header; /* 0-7 */ 155 u16 rnmax; /* 8-9 */ 156 u8 rnsize; /* 10 */ 157 u8 _pad_11[16 - 11]; /* 11-15 */ 158 u16 ncpurl; /* 16-17 */ 159 u16 cpuoff; /* 18-19 */ 160 u8 _pad_20[24 - 20]; /* 20-23 */ 161 u8 loadparm[8]; /* 24-31 */ 162 u8 _pad_32[42 - 32]; /* 32-41 */ 163 u8 fac42; /* 42 */ 164 u8 fac43; /* 43 */ 165 u8 _pad_44[48 - 44]; /* 44-47 */ 166 u64 facilities; /* 48-55 */ 167 u8 _pad_56[66 - 56]; /* 56-65 */ 168 u8 fac66; /* 66 */ 169 u8 _pad_67[76 - 67]; /* 67-83 */ 170 u32 ibc; /* 76-79 */ 171 u8 _pad80[84 - 80]; /* 80-83 */ 172 u8 fac84; /* 84 */ 173 u8 fac85; /* 85 */ 174 u8 _pad_86[91 - 86]; /* 86-90 */ 175 u8 fac91; /* 91 */ 176 u8 _pad_92[98 - 92]; /* 92-97 */ 177 u8 fac98; /* 98 */ 178 u8 hamaxpow; /* 99 */ 179 u32 rnsize2; /* 100-103 */ 180 u64 rnmax2; /* 104-111 */ 181 u32 hsa_size; /* 112-115 */ 182 u8 fac116; /* 116 */ 183 u8 fac117; /* 117 */ 184 u8 fac118; /* 118 */ 185 u8 fac119; /* 119 */ 186 u16 hcpua; /* 120-121 */ 187 u8 _pad_122[124 - 122]; /* 122-123 */ 188 u32 hmfai; /* 124-127 */ 189 u8 _pad_128[134 - 128]; /* 128-133 */ 190 u8 byte_134; /* 134 */ 191 u8 cpudirq; /* 135 */ 192 u16 cbl; /* 136-137 */ 193 u8 byte_138; /* 138 */ 194 u8 byte_139; /* 139 */ 195 u8 _pad_140[EXT_SCCB_READ_SCP - 140]; 196 } __packed __aligned(PAGE_SIZE); 197 198 struct read_storage_sccb { 199 struct sccb_header header; 200 u16 max_id; 201 u16 assigned; 202 u16 standby; 203 u16 :16; 204 u32 entries[]; 205 } __packed; 206 207 static inline void sclp_fill_core_info(struct sclp_core_info *info, 208 struct read_cpu_info_sccb *sccb) 209 { 210 char *page = (char *) sccb; 211 212 memset(info, 0, sizeof(*info)); 213 info->configured = sccb->nr_configured; 214 info->standby = sccb->nr_standby; 215 info->combined = sccb->nr_configured + sccb->nr_standby; 216 memcpy(&info->core, page + sccb->offset_configured, 217 info->combined * sizeof(struct sclp_core_entry)); 218 } 219 220 #define SCLP_HAS_CHP_INFO (sclp.facilities & 0x8000000000000000ULL) 221 #define SCLP_HAS_CHP_RECONFIG (sclp.facilities & 0x2000000000000000ULL) 222 #define SCLP_HAS_CPU_INFO (sclp.facilities & 0x0800000000000000ULL) 223 #define SCLP_HAS_CPU_RECONFIG (sclp.facilities & 0x0400000000000000ULL) 224 #define SCLP_HAS_PCI_RECONFIG (sclp.facilities & 0x0000000040000000ULL) 225 #define SCLP_HAS_AP_RECONFIG (sclp.facilities & 0x0000000100000000ULL) 226 227 struct gds_subvector { 228 u8 length; 229 u8 key; 230 } __attribute__((packed)); 231 232 struct gds_vector { 233 u16 length; 234 u16 gds_id; 235 } __attribute__((packed)); 236 237 struct sclp_req { 238 struct list_head list; /* list_head for request queueing. */ 239 sclp_cmdw_t command; /* sclp command to execute */ 240 void *sccb; /* pointer to the sccb to execute */ 241 char status; /* status of this request */ 242 int start_count; /* number of SVCs done for this req */ 243 /* Callback that is called after reaching final status. */ 244 void (*callback)(struct sclp_req *, void *data); 245 void *callback_data; 246 int queue_timeout; /* request queue timeout (sec), set by 247 caller of sclp_add_request(), if 248 needed */ 249 /* Internal fields */ 250 unsigned long queue_expires; /* request queue timeout (jiffies) */ 251 }; 252 253 #define SCLP_REQ_FILLED 0x00 /* request is ready to be processed */ 254 #define SCLP_REQ_QUEUED 0x01 /* request is queued to be processed */ 255 #define SCLP_REQ_RUNNING 0x02 /* request is currently running */ 256 #define SCLP_REQ_DONE 0x03 /* request is completed successfully */ 257 #define SCLP_REQ_FAILED 0x05 /* request is finally failed */ 258 #define SCLP_REQ_QUEUED_TIMEOUT 0x06 /* request on queue timed out */ 259 260 #define SCLP_QUEUE_INTERVAL 5 /* timeout interval for request queue */ 261 262 /* function pointers that a high level driver has to use for registration */ 263 /* of some routines it wants to be called from the low level driver */ 264 struct sclp_register { 265 struct list_head list; 266 /* User wants to receive: */ 267 sccb_mask_t receive_mask; 268 /* User wants to send: */ 269 sccb_mask_t send_mask; 270 /* H/W can receive: */ 271 sccb_mask_t sclp_receive_mask; 272 /* H/W can send: */ 273 sccb_mask_t sclp_send_mask; 274 /* called if event type availability changes */ 275 void (*state_change_fn)(struct sclp_register *); 276 /* called for events in cp_receive_mask/sclp_receive_mask */ 277 void (*receiver_fn)(struct evbuf_header *); 278 }; 279 280 /* externals from sclp.c */ 281 int sclp_add_request(struct sclp_req *req); 282 void sclp_sync_wait(void); 283 int sclp_register(struct sclp_register *reg); 284 void sclp_unregister(struct sclp_register *reg); 285 int sclp_remove_processed(struct sccb_header *sccb); 286 int sclp_deactivate(void); 287 int sclp_reactivate(void); 288 int sclp_sync_request(sclp_cmdw_t command, void *sccb); 289 int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout); 290 int sclp_sdias_init(void); 291 292 enum { 293 sclp_init_state_uninitialized, 294 sclp_init_state_initializing, 295 sclp_init_state_initialized 296 }; 297 298 extern int sclp_init_state; 299 extern int sclp_console_pages; 300 extern bool sclp_console_drop; 301 extern unsigned long sclp_console_full; 302 extern bool sclp_mask_compat_mode; 303 304 void sclp_early_wait_irq(void); 305 int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb); 306 unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb); 307 unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb); 308 int sclp_early_set_event_mask(struct init_sccb *sccb, 309 sccb_mask_t receive_mask, 310 sccb_mask_t send_mask); 311 struct read_info_sccb * __init sclp_early_get_info(void); 312 313 /* useful inlines */ 314 315 /* Perform service call. Return 0 on success, non-zero otherwise. */ 316 static inline int sclp_service_call(sclp_cmdw_t command, void *sccb) 317 { 318 int cc, exception; 319 320 exception = 1; 321 asm_inline volatile( 322 "0: .insn rre,0xb2200000,%[cmd],%[sccb]\n" /* servc */ 323 "1: lhi %[exc],0\n" 324 "2:\n" 325 CC_IPM(cc) 326 EX_TABLE(0b, 2b) 327 EX_TABLE(1b, 2b) 328 : CC_OUT(cc, cc), [exc] "+d" (exception) 329 : [cmd] "d" (command), [sccb] "a" (__pa(sccb)) 330 : CC_CLOBBER_LIST("memory")); 331 if (exception) 332 return -EINVAL; 333 cc = CC_TRANSFORM(cc); 334 if (cc == 3) 335 return -EIO; 336 if (cc == 2) 337 return -EBUSY; 338 return 0; 339 } 340 341 /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */ 342 /* translate single character from ASCII to EBCDIC */ 343 static inline unsigned char 344 sclp_ascebc(unsigned char ch) 345 { 346 return (machine_is_vm()) ? _ascebc[ch] : _ascebc_500[ch]; 347 } 348 349 /* translate string from EBCDIC to ASCII */ 350 static inline void 351 sclp_ebcasc_str(char *str, int nr) 352 { 353 (machine_is_vm()) ? EBCASC(str, nr) : EBCASC_500(str, nr); 354 } 355 356 /* translate string from ASCII to EBCDIC */ 357 static inline void 358 sclp_ascebc_str(char *str, int nr) 359 { 360 (machine_is_vm()) ? ASCEBC(str, nr) : ASCEBC_500(str, nr); 361 } 362 363 static inline struct gds_vector * 364 sclp_find_gds_vector(void *start, void *end, u16 id) 365 { 366 struct gds_vector *v; 367 368 for (v = start; (void *) v < end; v = (void *) v + v->length) 369 if (v->gds_id == id) 370 return v; 371 return NULL; 372 } 373 374 static inline struct gds_subvector * 375 sclp_find_gds_subvector(void *start, void *end, u8 key) 376 { 377 struct gds_subvector *sv; 378 379 for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length) 380 if (sv->key == key) 381 return sv; 382 return NULL; 383 } 384 385 #endif /* __SCLP_H__ */ 386