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