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 { |
88 | u16 ; |
89 | u8 ; |
90 | u8 [3]; |
91 | u16 ; |
92 | } __attribute__((packed)); |
93 | |
94 | struct init_sccb { |
95 | struct sccb_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 ; |
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 ; /* 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 ; |
203 | u16 max_id; |
204 | u16 assigned; |
205 | u16 standby; |
206 | u16 :16; |
207 | u32 entries[]; |
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 { |
241 | u16 ; |
242 | u8 ; |
243 | u8 ; |
244 | u16 ; |
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 | |