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 
sccb_get_mask(u8 * masks,size_t len,int i)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 
sccb_set_mask(u8 * masks,size_t len,int i,sccb_mask_t val)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 
sclp_fill_core_info(struct sclp_core_info * info,struct read_cpu_info_sccb * sccb)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 int 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. */
sclp_service_call(sclp_cmdw_t command,void * sccb)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
sclp_ascebc(unsigned char ch)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
sclp_ebcasc_str(char * str,int nr)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
sclp_ascebc_str(char * str,int nr)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 *
sclp_find_gds_vector(void * start,void * end,u16 id)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 *
sclp_find_gds_subvector(void * start,void * end,u8 key)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