sclp.h 12 KB

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  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. #ifndef __SCLP_H__
  9. #define __SCLP_H__
  10. #include <linux/types.h>
  11. #include <linux/list.h>
  12. #include <asm/sclp.h>
  13. #include <asm/ebcdic.h>
  14. /* maximum number of pages concerning our own memory management */
  15. #define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
  16. #define SCLP_CONSOLE_PAGES 6
  17. #define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T)))
  18. #define EVTYP_OPCMD 0x01
  19. #define EVTYP_MSG 0x02
  20. #define EVTYP_CONFMGMDATA 0x04
  21. #define EVTYP_DIAG_TEST 0x07
  22. #define EVTYP_STATECHANGE 0x08
  23. #define EVTYP_PMSGCMD 0x09
  24. #define EVTYP_ASYNC 0x0A
  25. #define EVTYP_CTLPROGIDENT 0x0B
  26. #define EVTYP_STORE_DATA 0x0C
  27. #define EVTYP_ERRNOTIFY 0x18
  28. #define EVTYP_VT220MSG 0x1A
  29. #define EVTYP_SDIAS 0x1C
  30. #define EVTYP_SIGQUIESCE 0x1D
  31. #define EVTYP_OCF 0x1E
  32. #define EVTYP_OPCMD_MASK SCLP_EVTYP_MASK(EVTYP_OPCMD)
  33. #define EVTYP_MSG_MASK SCLP_EVTYP_MASK(EVTYP_MSG)
  34. #define EVTYP_CONFMGMDATA_MASK SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
  35. #define EVTYP_DIAG_TEST_MASK SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
  36. #define EVTYP_STATECHANGE_MASK SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
  37. #define EVTYP_PMSGCMD_MASK SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
  38. #define EVTYP_ASYNC_MASK SCLP_EVTYP_MASK(EVTYP_ASYNC)
  39. #define EVTYP_CTLPROGIDENT_MASK SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
  40. #define EVTYP_STORE_DATA_MASK SCLP_EVTYP_MASK(EVTYP_STORE_DATA)
  41. #define EVTYP_ERRNOTIFY_MASK SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
  42. #define EVTYP_VT220MSG_MASK SCLP_EVTYP_MASK(EVTYP_VT220MSG)
  43. #define EVTYP_SDIAS_MASK SCLP_EVTYP_MASK(EVTYP_SDIAS)
  44. #define EVTYP_SIGQUIESCE_MASK SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
  45. #define EVTYP_OCF_MASK SCLP_EVTYP_MASK(EVTYP_OCF)
  46. #define GNRLMSGFLGS_DOM 0x8000
  47. #define GNRLMSGFLGS_SNDALRM 0x4000
  48. #define GNRLMSGFLGS_HOLDMSG 0x2000
  49. #define LNTPFLGS_CNTLTEXT 0x8000
  50. #define LNTPFLGS_LABELTEXT 0x4000
  51. #define LNTPFLGS_DATATEXT 0x2000
  52. #define LNTPFLGS_ENDTEXT 0x1000
  53. #define LNTPFLGS_PROMPTTEXT 0x0800
  54. typedef unsigned int sclp_cmdw_t;
  55. #define SCLP_CMDW_READ_CPU_INFO 0x00010001
  56. #define SCLP_CMDW_READ_SCP_INFO 0x00020001
  57. #define SCLP_CMDW_READ_STORAGE_INFO 0x00040001
  58. #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
  59. #define SCLP_CMDW_READ_EVENT_DATA 0x00770005
  60. #define SCLP_CMDW_WRITE_EVENT_DATA 0x00760005
  61. #define SCLP_CMDW_WRITE_EVENT_MASK 0x00780005
  62. #define GDS_ID_MDSMU 0x1310
  63. #define GDS_ID_MDSROUTEINFO 0x1311
  64. #define GDS_ID_AGUNWRKCORR 0x1549
  65. #define GDS_ID_SNACONDREPORT 0x1532
  66. #define GDS_ID_CPMSU 0x1212
  67. #define GDS_ID_ROUTTARGINSTR 0x154D
  68. #define GDS_ID_OPREQ 0x8070
  69. #define GDS_ID_TEXTCMD 0x1320
  70. #define GDS_KEY_SELFDEFTEXTMSG 0x31
  71. enum sclp_pm_event {
  72. SCLP_PM_EVENT_FREEZE,
  73. SCLP_PM_EVENT_THAW,
  74. SCLP_PM_EVENT_RESTORE,
  75. };
  76. #define SCLP_PANIC_PRIO 1
  77. #define SCLP_PANIC_PRIO_CLIENT 0
  78. typedef u64 sccb_mask_t;
  79. struct sccb_header {
  80. u16 length;
  81. u8 function_code;
  82. u8 control_mask[3];
  83. u16 response_code;
  84. } __attribute__((packed));
  85. struct init_sccb {
  86. struct sccb_header header;
  87. u16 _reserved;
  88. u16 mask_length;
  89. u8 masks[4 * 1021]; /* variable length */
  90. /*
  91. * u8 receive_mask[mask_length];
  92. * u8 send_mask[mask_length];
  93. * u8 sclp_receive_mask[mask_length];
  94. * u8 sclp_send_mask[mask_length];
  95. */
  96. } __attribute__((packed));
  97. #define SCLP_MASK_SIZE_COMPAT 4
  98. static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i)
  99. {
  100. sccb_mask_t res = 0;
  101. memcpy(&res, masks + i * len, min(sizeof(res), len));
  102. return res;
  103. }
  104. static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val)
  105. {
  106. memset(masks + i * len, 0, len);
  107. memcpy(masks + i * len, &val, min(sizeof(val), len));
  108. }
  109. #define sccb_get_generic_mask(sccb, i) \
  110. ({ \
  111. __typeof__(sccb) __sccb = sccb; \
  112. \
  113. sccb_get_mask(__sccb->masks, __sccb->mask_length, i); \
  114. })
  115. #define sccb_get_recv_mask(sccb) sccb_get_generic_mask(sccb, 0)
  116. #define sccb_get_send_mask(sccb) sccb_get_generic_mask(sccb, 1)
  117. #define sccb_get_sclp_recv_mask(sccb) sccb_get_generic_mask(sccb, 2)
  118. #define sccb_get_sclp_send_mask(sccb) sccb_get_generic_mask(sccb, 3)
  119. #define sccb_set_generic_mask(sccb, i, val) \
  120. ({ \
  121. __typeof__(sccb) __sccb = sccb; \
  122. \
  123. sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val); \
  124. })
  125. #define sccb_set_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 0, val)
  126. #define sccb_set_send_mask(sccb, val) sccb_set_generic_mask(sccb, 1, val)
  127. #define sccb_set_sclp_recv_mask(sccb, val) sccb_set_generic_mask(sccb, 2, val)
  128. #define sccb_set_sclp_send_mask(sccb, val) sccb_set_generic_mask(sccb, 3, val)
  129. struct read_cpu_info_sccb {
  130. struct sccb_header header;
  131. u16 nr_configured;
  132. u16 offset_configured;
  133. u16 nr_standby;
  134. u16 offset_standby;
  135. u8 reserved[4096 - 16];
  136. } __attribute__((packed, aligned(PAGE_SIZE)));
  137. struct read_info_sccb {
  138. struct sccb_header header; /* 0-7 */
  139. u16 rnmax; /* 8-9 */
  140. u8 rnsize; /* 10 */
  141. u8 _pad_11[16 - 11]; /* 11-15 */
  142. u16 ncpurl; /* 16-17 */
  143. u16 cpuoff; /* 18-19 */
  144. u8 _pad_20[24 - 20]; /* 20-23 */
  145. u8 loadparm[8]; /* 24-31 */
  146. u8 _pad_32[42 - 32]; /* 32-41 */
  147. u8 fac42; /* 42 */
  148. u8 fac43; /* 43 */
  149. u8 _pad_44[48 - 44]; /* 44-47 */
  150. u64 facilities; /* 48-55 */
  151. u8 _pad_56[66 - 56]; /* 56-65 */
  152. u8 fac66; /* 66 */
  153. u8 _pad_67[76 - 67]; /* 67-83 */
  154. u32 ibc; /* 76-79 */
  155. u8 _pad80[84 - 80]; /* 80-83 */
  156. u8 fac84; /* 84 */
  157. u8 fac85; /* 85 */
  158. u8 _pad_86[91 - 86]; /* 86-90 */
  159. u8 fac91; /* 91 */
  160. u8 _pad_92[98 - 92]; /* 92-97 */
  161. u8 fac98; /* 98 */
  162. u8 hamaxpow; /* 99 */
  163. u32 rnsize2; /* 100-103 */
  164. u64 rnmax2; /* 104-111 */
  165. u32 hsa_size; /* 112-115 */
  166. u8 fac116; /* 116 */
  167. u8 fac117; /* 117 */
  168. u8 fac118; /* 118 */
  169. u8 fac119; /* 119 */
  170. u16 hcpua; /* 120-121 */
  171. u8 _pad_122[124 - 122]; /* 122-123 */
  172. u32 hmfai; /* 124-127 */
  173. u8 _pad_128[4096 - 128]; /* 128-4095 */
  174. } __packed __aligned(PAGE_SIZE);
  175. struct read_storage_sccb {
  176. struct sccb_header header;
  177. u16 max_id;
  178. u16 assigned;
  179. u16 standby;
  180. u16 :16;
  181. u32 entries[0];
  182. } __packed;
  183. static inline void sclp_fill_core_info(struct sclp_core_info *info,
  184. struct read_cpu_info_sccb *sccb)
  185. {
  186. char *page = (char *) sccb;
  187. memset(info, 0, sizeof(*info));
  188. info->configured = sccb->nr_configured;
  189. info->standby = sccb->nr_standby;
  190. info->combined = sccb->nr_configured + sccb->nr_standby;
  191. memcpy(&info->core, page + sccb->offset_configured,
  192. info->combined * sizeof(struct sclp_core_entry));
  193. }
  194. #define SCLP_HAS_CHP_INFO (sclp.facilities & 0x8000000000000000ULL)
  195. #define SCLP_HAS_CHP_RECONFIG (sclp.facilities & 0x2000000000000000ULL)
  196. #define SCLP_HAS_CPU_INFO (sclp.facilities & 0x0800000000000000ULL)
  197. #define SCLP_HAS_CPU_RECONFIG (sclp.facilities & 0x0400000000000000ULL)
  198. #define SCLP_HAS_PCI_RECONFIG (sclp.facilities & 0x0000000040000000ULL)
  199. struct gds_subvector {
  200. u8 length;
  201. u8 key;
  202. } __attribute__((packed));
  203. struct gds_vector {
  204. u16 length;
  205. u16 gds_id;
  206. } __attribute__((packed));
  207. struct evbuf_header {
  208. u16 length;
  209. u8 type;
  210. u8 flags;
  211. u16 _reserved;
  212. } __attribute__((packed));
  213. struct sclp_req {
  214. struct list_head list; /* list_head for request queueing. */
  215. sclp_cmdw_t command; /* sclp command to execute */
  216. void *sccb; /* pointer to the sccb to execute */
  217. char status; /* status of this request */
  218. int start_count; /* number of SVCs done for this req */
  219. /* Callback that is called after reaching final status. */
  220. void (*callback)(struct sclp_req *, void *data);
  221. void *callback_data;
  222. int queue_timeout; /* request queue timeout (sec), set by
  223. caller of sclp_add_request(), if
  224. needed */
  225. /* Internal fields */
  226. unsigned long queue_expires; /* request queue timeout (jiffies) */
  227. };
  228. #define SCLP_REQ_FILLED 0x00 /* request is ready to be processed */
  229. #define SCLP_REQ_QUEUED 0x01 /* request is queued to be processed */
  230. #define SCLP_REQ_RUNNING 0x02 /* request is currently running */
  231. #define SCLP_REQ_DONE 0x03 /* request is completed successfully */
  232. #define SCLP_REQ_FAILED 0x05 /* request is finally failed */
  233. #define SCLP_REQ_QUEUED_TIMEOUT 0x06 /* request on queue timed out */
  234. #define SCLP_QUEUE_INTERVAL 5 /* timeout interval for request queue */
  235. /* function pointers that a high level driver has to use for registration */
  236. /* of some routines it wants to be called from the low level driver */
  237. struct sclp_register {
  238. struct list_head list;
  239. /* User wants to receive: */
  240. sccb_mask_t receive_mask;
  241. /* User wants to send: */
  242. sccb_mask_t send_mask;
  243. /* H/W can receive: */
  244. sccb_mask_t sclp_receive_mask;
  245. /* H/W can send: */
  246. sccb_mask_t sclp_send_mask;
  247. /* called if event type availability changes */
  248. void (*state_change_fn)(struct sclp_register *);
  249. /* called for events in cp_receive_mask/sclp_receive_mask */
  250. void (*receiver_fn)(struct evbuf_header *);
  251. /* called for power management events */
  252. void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
  253. /* pm event posted flag */
  254. int pm_event_posted;
  255. };
  256. /* externals from sclp.c */
  257. int sclp_add_request(struct sclp_req *req);
  258. void sclp_sync_wait(void);
  259. int sclp_register(struct sclp_register *reg);
  260. void sclp_unregister(struct sclp_register *reg);
  261. int sclp_remove_processed(struct sccb_header *sccb);
  262. int sclp_deactivate(void);
  263. int sclp_reactivate(void);
  264. int sclp_sync_request(sclp_cmdw_t command, void *sccb);
  265. int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);
  266. int sclp_sdias_init(void);
  267. void sclp_sdias_exit(void);
  268. enum {
  269. sclp_init_state_uninitialized,
  270. sclp_init_state_initializing,
  271. sclp_init_state_initialized
  272. };
  273. extern int sclp_init_state;
  274. extern int sclp_console_pages;
  275. extern int sclp_console_drop;
  276. extern unsigned long sclp_console_full;
  277. extern bool sclp_mask_compat_mode;
  278. extern char sclp_early_sccb[PAGE_SIZE];
  279. void sclp_early_wait_irq(void);
  280. int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
  281. unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
  282. unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
  283. int sclp_early_set_event_mask(struct init_sccb *sccb,
  284. sccb_mask_t receive_mask,
  285. sccb_mask_t send_mask);
  286. int sclp_early_get_info(struct read_info_sccb *info);
  287. /* useful inlines */
  288. /* Perform service call. Return 0 on success, non-zero otherwise. */
  289. static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
  290. {
  291. int cc = 4; /* Initialize for program check handling */
  292. asm volatile(
  293. "0: .insn rre,0xb2200000,%1,%2\n" /* servc %1,%2 */
  294. "1: ipm %0\n"
  295. " srl %0,28\n"
  296. "2:\n"
  297. EX_TABLE(0b, 2b)
  298. EX_TABLE(1b, 2b)
  299. : "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
  300. : "cc", "memory");
  301. if (cc == 4)
  302. return -EINVAL;
  303. if (cc == 3)
  304. return -EIO;
  305. if (cc == 2)
  306. return -EBUSY;
  307. return 0;
  308. }
  309. /* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
  310. /* translate single character from ASCII to EBCDIC */
  311. static inline unsigned char
  312. sclp_ascebc(unsigned char ch)
  313. {
  314. return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
  315. }
  316. /* translate string from EBCDIC to ASCII */
  317. static inline void
  318. sclp_ebcasc_str(unsigned char *str, int nr)
  319. {
  320. (MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
  321. }
  322. /* translate string from ASCII to EBCDIC */
  323. static inline void
  324. sclp_ascebc_str(unsigned char *str, int nr)
  325. {
  326. (MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
  327. }
  328. static inline struct gds_vector *
  329. sclp_find_gds_vector(void *start, void *end, u16 id)
  330. {
  331. struct gds_vector *v;
  332. for (v = start; (void *) v < end; v = (void *) v + v->length)
  333. if (v->gds_id == id)
  334. return v;
  335. return NULL;
  336. }
  337. static inline struct gds_subvector *
  338. sclp_find_gds_subvector(void *start, void *end, u8 key)
  339. {
  340. struct gds_subvector *sv;
  341. for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
  342. if (sv->key == key)
  343. return sv;
  344. return NULL;
  345. }
  346. #endif /* __SCLP_H__ */