summaryrefslogtreecommitdiff
path: root/drivers/s390/char/sclp.h
blob: 367e9d384d852b3140158302e5e713ffa2d43616 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright IBM Corp. 1999,2012
 *
 * Author(s): Martin Peschke <mpeschke@de.ibm.com>
 *	      Martin Schwidefsky <schwidefsky@de.ibm.com>
 */

#ifndef __SCLP_H__
#define __SCLP_H__

#include <linux/types.h>
#include <linux/list.h>
#include <asm/sclp.h>
#include <asm/ebcdic.h>

/* maximum number of pages concerning our own memory management */
#define MAX_KMEM_PAGES (sizeof(unsigned long) << 3)
#define SCLP_CONSOLE_PAGES	6

#define SCLP_EVTYP_MASK(T) (1UL << (sizeof(sccb_mask_t) * BITS_PER_BYTE - (T)))

#define EVTYP_OPCMD		0x01
#define EVTYP_MSG		0x02
#define EVTYP_CONFMGMDATA	0x04
#define EVTYP_DIAG_TEST		0x07
#define EVTYP_STATECHANGE	0x08
#define EVTYP_PMSGCMD		0x09
#define EVTYP_ASYNC		0x0A
#define EVTYP_CTLPROGIDENT	0x0B
#define EVTYP_STORE_DATA	0x0C
#define EVTYP_ERRNOTIFY		0x18
#define EVTYP_VT220MSG		0x1A
#define EVTYP_SDIAS		0x1C
#define EVTYP_SIGQUIESCE	0x1D
#define EVTYP_OCF		0x1E

#define EVTYP_OPCMD_MASK	SCLP_EVTYP_MASK(EVTYP_OPCMD)
#define EVTYP_MSG_MASK		SCLP_EVTYP_MASK(EVTYP_MSG)
#define EVTYP_CONFMGMDATA_MASK	SCLP_EVTYP_MASK(EVTYP_CONFMGMDATA)
#define EVTYP_DIAG_TEST_MASK	SCLP_EVTYP_MASK(EVTYP_DIAG_TEST)
#define EVTYP_STATECHANGE_MASK	SCLP_EVTYP_MASK(EVTYP_STATECHANGE)
#define EVTYP_PMSGCMD_MASK	SCLP_EVTYP_MASK(EVTYP_PMSGCMD)
#define EVTYP_ASYNC_MASK	SCLP_EVTYP_MASK(EVTYP_ASYNC)
#define EVTYP_CTLPROGIDENT_MASK	SCLP_EVTYP_MASK(EVTYP_CTLPROGIDENT)
#define EVTYP_STORE_DATA_MASK	SCLP_EVTYP_MASK(EVTYP_STORE_DATA)
#define EVTYP_ERRNOTIFY_MASK	SCLP_EVTYP_MASK(EVTYP_ERRNOTIFY)
#define EVTYP_VT220MSG_MASK	SCLP_EVTYP_MASK(EVTYP_VT220MSG)
#define EVTYP_SDIAS_MASK	SCLP_EVTYP_MASK(EVTYP_SDIAS)
#define EVTYP_SIGQUIESCE_MASK	SCLP_EVTYP_MASK(EVTYP_SIGQUIESCE)
#define EVTYP_OCF_MASK		SCLP_EVTYP_MASK(EVTYP_OCF)

#define GNRLMSGFLGS_DOM		0x8000
#define GNRLMSGFLGS_SNDALRM	0x4000
#define GNRLMSGFLGS_HOLDMSG	0x2000

#define LNTPFLGS_CNTLTEXT	0x8000
#define LNTPFLGS_LABELTEXT	0x4000
#define LNTPFLGS_DATATEXT	0x2000
#define LNTPFLGS_ENDTEXT	0x1000
#define LNTPFLGS_PROMPTTEXT	0x0800

typedef unsigned int sclp_cmdw_t;

#define SCLP_CMDW_READ_CPU_INFO		0x00010001
#define SCLP_CMDW_READ_SCP_INFO		0x00020001
#define SCLP_CMDW_READ_STORAGE_INFO	0x00040001
#define SCLP_CMDW_READ_SCP_INFO_FORCED	0x00120001
#define SCLP_CMDW_READ_EVENT_DATA	0x00770005
#define SCLP_CMDW_WRITE_EVENT_DATA	0x00760005
#define SCLP_CMDW_WRITE_EVENT_MASK	0x00780005

#define GDS_ID_MDSMU		0x1310
#define GDS_ID_MDSROUTEINFO	0x1311
#define GDS_ID_AGUNWRKCORR	0x1549
#define GDS_ID_SNACONDREPORT	0x1532
#define GDS_ID_CPMSU		0x1212
#define GDS_ID_ROUTTARGINSTR	0x154D
#define GDS_ID_OPREQ		0x8070
#define GDS_ID_TEXTCMD		0x1320

#define GDS_KEY_SELFDEFTEXTMSG	0x31

enum sclp_pm_event {
	SCLP_PM_EVENT_FREEZE,
	SCLP_PM_EVENT_THAW,
	SCLP_PM_EVENT_RESTORE,
};

#define SCLP_PANIC_PRIO		1
#define SCLP_PANIC_PRIO_CLIENT	0

typedef u64 sccb_mask_t;

struct sccb_header {
	u16	length;
	u8	function_code;
	u8	control_mask[3];
	u16	response_code;
} __attribute__((packed));

struct init_sccb {
	struct sccb_header header;
	u16 _reserved;
	u16 mask_length;
	u8 masks[4 * 1021];	/* variable length */
	/*
	 * u8 receive_mask[mask_length];
	 * u8 send_mask[mask_length];
	 * u8 sclp_receive_mask[mask_length];
	 * u8 sclp_send_mask[mask_length];
	 */
} __attribute__((packed));

#define SCLP_MASK_SIZE_COMPAT 4

static inline sccb_mask_t sccb_get_mask(u8 *masks, size_t len, int i)
{
	sccb_mask_t res = 0;

	memcpy(&res, masks + i * len, min(sizeof(res), len));
	return res;
}

static inline void sccb_set_mask(u8 *masks, size_t len, int i, sccb_mask_t val)
{
	memset(masks + i * len, 0, len);
	memcpy(masks + i * len, &val, min(sizeof(val), len));
}

#define sccb_get_generic_mask(sccb, i)					\
({									\
	__typeof__(sccb) __sccb = sccb;					\
									\
	sccb_get_mask(__sccb->masks, __sccb->mask_length, i);		\
})
#define sccb_get_recv_mask(sccb)	sccb_get_generic_mask(sccb, 0)
#define sccb_get_send_mask(sccb)	sccb_get_generic_mask(sccb, 1)
#define sccb_get_sclp_recv_mask(sccb)	sccb_get_generic_mask(sccb, 2)
#define sccb_get_sclp_send_mask(sccb)	sccb_get_generic_mask(sccb, 3)

#define sccb_set_generic_mask(sccb, i, val)				\
({									\
	__typeof__(sccb) __sccb = sccb;					\
									\
	sccb_set_mask(__sccb->masks, __sccb->mask_length, i, val);	\
})
#define sccb_set_recv_mask(sccb, val)	    sccb_set_generic_mask(sccb, 0, val)
#define sccb_set_send_mask(sccb, val)	    sccb_set_generic_mask(sccb, 1, val)
#define sccb_set_sclp_recv_mask(sccb, val)  sccb_set_generic_mask(sccb, 2, val)
#define sccb_set_sclp_send_mask(sccb, val)  sccb_set_generic_mask(sccb, 3, val)

struct read_cpu_info_sccb {
	struct	sccb_header header;
	u16	nr_configured;
	u16	offset_configured;
	u16	nr_standby;
	u16	offset_standby;
	u8	reserved[4096 - 16];
} __attribute__((packed, aligned(PAGE_SIZE)));

struct read_info_sccb {
	struct	sccb_header header;	/* 0-7 */
	u16	rnmax;			/* 8-9 */
	u8	rnsize;			/* 10 */
	u8	_pad_11[16 - 11];	/* 11-15 */
	u16	ncpurl;			/* 16-17 */
	u16	cpuoff;			/* 18-19 */
	u8	_pad_20[24 - 20];	/* 20-23 */
	u8	loadparm[8];		/* 24-31 */
	u8	_pad_32[42 - 32];	/* 32-41 */
	u8	fac42;			/* 42 */
	u8	fac43;			/* 43 */
	u8	_pad_44[48 - 44];	/* 44-47 */
	u64	facilities;		/* 48-55 */
	u8	_pad_56[66 - 56];	/* 56-65 */
	u8	fac66;			/* 66 */
	u8	_pad_67[76 - 67];	/* 67-83 */
	u32	ibc;			/* 76-79 */
	u8	_pad80[84 - 80];	/* 80-83 */
	u8	fac84;			/* 84 */
	u8	fac85;			/* 85 */
	u8	_pad_86[91 - 86];	/* 86-90 */
	u8	fac91;			/* 91 */
	u8	_pad_92[98 - 92];	/* 92-97 */
	u8	fac98;			/* 98 */
	u8	hamaxpow;		/* 99 */
	u32	rnsize2;		/* 100-103 */
	u64	rnmax2;			/* 104-111 */
	u32	hsa_size;		/* 112-115 */
	u8	fac116;			/* 116 */
	u8	fac117;			/* 117 */
	u8	fac118;			/* 118 */
	u8	fac119;			/* 119 */
	u16	hcpua;			/* 120-121 */
	u8	_pad_122[124 - 122];	/* 122-123 */
	u32	hmfai;			/* 124-127 */
	u8	_pad_128[134 - 128];	/* 128-133 */
	u8	byte_134;			/* 134 */
	u8	_pad_135[4096 - 135];	/* 135-4095 */
} __packed __aligned(PAGE_SIZE);

struct read_storage_sccb {
	struct sccb_header header;
	u16 max_id;
	u16 assigned;
	u16 standby;
	u16 :16;
	u32 entries[0];
} __packed;

static inline void sclp_fill_core_info(struct sclp_core_info *info,
				       struct read_cpu_info_sccb *sccb)
{
	char *page = (char *) sccb;

	memset(info, 0, sizeof(*info));
	info->configured = sccb->nr_configured;
	info->standby = sccb->nr_standby;
	info->combined = sccb->nr_configured + sccb->nr_standby;
	memcpy(&info->core, page + sccb->offset_configured,
	       info->combined * sizeof(struct sclp_core_entry));
}

#define SCLP_HAS_CHP_INFO	(sclp.facilities & 0x8000000000000000ULL)
#define SCLP_HAS_CHP_RECONFIG	(sclp.facilities & 0x2000000000000000ULL)
#define SCLP_HAS_CPU_INFO	(sclp.facilities & 0x0800000000000000ULL)
#define SCLP_HAS_CPU_RECONFIG	(sclp.facilities & 0x0400000000000000ULL)
#define SCLP_HAS_PCI_RECONFIG	(sclp.facilities & 0x0000000040000000ULL)


struct gds_subvector {
	u8	length;
	u8	key;
} __attribute__((packed));

struct gds_vector {
	u16	length;
	u16	gds_id;
} __attribute__((packed));

struct evbuf_header {
	u16	length;
	u8	type;
	u8	flags;
	u16	_reserved;
} __attribute__((packed));

struct sclp_req {
	struct list_head list;		/* list_head for request queueing. */
	sclp_cmdw_t command;		/* sclp command to execute */
	void	*sccb;			/* pointer to the sccb to execute */
	char	status;			/* status of this request */
	int     start_count;		/* number of SVCs done for this req */
	/* Callback that is called after reaching final status. */
	void (*callback)(struct sclp_req *, void *data);
	void *callback_data;
	int queue_timeout;		/* request queue timeout (sec), set by
					   caller of sclp_add_request(), if
					   needed */
	/* Internal fields */
	unsigned long queue_expires;	/* request queue timeout (jiffies) */
};

#define SCLP_REQ_FILLED	  0x00	/* request is ready to be processed */
#define SCLP_REQ_QUEUED	  0x01	/* request is queued to be processed */
#define SCLP_REQ_RUNNING  0x02	/* request is currently running */
#define SCLP_REQ_DONE	  0x03	/* request is completed successfully */
#define SCLP_REQ_FAILED	  0x05	/* request is finally failed */
#define SCLP_REQ_QUEUED_TIMEOUT 0x06	/* request on queue timed out */

#define SCLP_QUEUE_INTERVAL 5	/* timeout interval for request queue */

/* function pointers that a high level driver has to use for registration */
/* of some routines it wants to be called from the low level driver */
struct sclp_register {
	struct list_head list;
	/* User wants to receive: */
	sccb_mask_t receive_mask;
	/* User wants to send: */
	sccb_mask_t send_mask;
	/* H/W can receive: */
	sccb_mask_t sclp_receive_mask;
	/* H/W can send: */
	sccb_mask_t sclp_send_mask;
	/* called if event type availability changes */
	void (*state_change_fn)(struct sclp_register *);
	/* called for events in cp_receive_mask/sclp_receive_mask */
	void (*receiver_fn)(struct evbuf_header *);
	/* called for power management events */
	void (*pm_event_fn)(struct sclp_register *, enum sclp_pm_event);
	/* pm event posted flag */
	int pm_event_posted;
};

/* externals from sclp.c */
int sclp_add_request(struct sclp_req *req);
void sclp_sync_wait(void);
int sclp_register(struct sclp_register *reg);
void sclp_unregister(struct sclp_register *reg);
int sclp_remove_processed(struct sccb_header *sccb);
int sclp_deactivate(void);
int sclp_reactivate(void);
int sclp_sync_request(sclp_cmdw_t command, void *sccb);
int sclp_sync_request_timeout(sclp_cmdw_t command, void *sccb, int timeout);

int sclp_sdias_init(void);
void sclp_sdias_exit(void);

enum {
	sclp_init_state_uninitialized,
	sclp_init_state_initializing,
	sclp_init_state_initialized
};

extern int sclp_init_state;
extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;
extern bool sclp_mask_compat_mode;

extern char sclp_early_sccb[PAGE_SIZE];

void sclp_early_wait_irq(void);
int sclp_early_cmd(sclp_cmdw_t cmd, void *sccb);
unsigned int sclp_early_con_check_linemode(struct init_sccb *sccb);
unsigned int sclp_early_con_check_vt220(struct init_sccb *sccb);
int sclp_early_set_event_mask(struct init_sccb *sccb,
			      sccb_mask_t receive_mask,
			      sccb_mask_t send_mask);
int sclp_early_get_info(struct read_info_sccb *info);

/* useful inlines */

/* Perform service call. Return 0 on success, non-zero otherwise. */
static inline int sclp_service_call(sclp_cmdw_t command, void *sccb)
{
	int cc = 4; /* Initialize for program check handling */

	asm volatile(
		"0:	.insn	rre,0xb2200000,%1,%2\n"	 /* servc %1,%2 */
		"1:	ipm	%0\n"
		"	srl	%0,28\n"
		"2:\n"
		EX_TABLE(0b, 2b)
		EX_TABLE(1b, 2b)
		: "+&d" (cc) : "d" (command), "a" ((unsigned long)sccb)
		: "cc", "memory");
	if (cc == 4)
		return -EINVAL;
	if (cc == 3)
		return -EIO;
	if (cc == 2)
		return -EBUSY;
	return 0;
}

/* VM uses EBCDIC 037, LPAR+native(SE+HMC) use EBCDIC 500 */
/* translate single character from ASCII to EBCDIC */
static inline unsigned char
sclp_ascebc(unsigned char ch)
{
	return (MACHINE_IS_VM) ? _ascebc[ch] : _ascebc_500[ch];
}

/* translate string from EBCDIC to ASCII */
static inline void
sclp_ebcasc_str(unsigned char *str, int nr)
{
	(MACHINE_IS_VM) ? EBCASC(str, nr) : EBCASC_500(str, nr);
}

/* translate string from ASCII to EBCDIC */
static inline void
sclp_ascebc_str(unsigned char *str, int nr)
{
	(MACHINE_IS_VM) ? ASCEBC(str, nr) : ASCEBC_500(str, nr);
}

static inline struct gds_vector *
sclp_find_gds_vector(void *start, void *end, u16 id)
{
	struct gds_vector *v;

	for (v = start; (void *) v < end; v = (void *) v + v->length)
		if (v->gds_id == id)
			return v;
	return NULL;
}

static inline struct gds_subvector *
sclp_find_gds_subvector(void *start, void *end, u8 key)
{
	struct gds_subvector *sv;

	for (sv = start; (void *) sv < end; sv = (void *) sv + sv->length)
		if (sv->key == key)
			return sv;
	return NULL;
}

#endif	 /* __SCLP_H__ */