aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/bfa/bfa_cs.h
blob: 7260c74620f8fa5f2fd4cbe0060d1e87a326d6b4 (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
/*
 * Copyright (c) 2005-2010 Brocade Communications Systems, Inc.
 * All rights reserved
 * www.brocade.com
 *
 * Linux driver for Brocade Fibre Channel Host Bus Adapter.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License (GPL) Version 2 as
 * published by the Free Software Foundation
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 */

/**
 *  bfa_cs.h BFA common services
 */

#ifndef __BFA_CS_H__
#define __BFA_CS_H__

#include "bfa_os_inc.h"

/**
 * BFA TRC
 */

#ifndef BFA_TRC_MAX
#define BFA_TRC_MAX	(4 * 1024)
#endif

#ifndef BFA_TRC_TS
#define BFA_TRC_TS(_trcm)	((_trcm)->ticks++)
#endif

struct bfa_trc_s {
#ifdef __BIGENDIAN
	u16	fileno;
	u16	line;
#else
	u16	line;
	u16	fileno;
#endif
	u32	timestamp;
	union {
		struct {
			u32	rsvd;
			u32	u32;
		} u32;
		u64	u64;
	} data;
};

struct bfa_trc_mod_s {
	u32	head;
	u32	tail;
	u32	ntrc;
	u32	stopped;
	u32	ticks;
	u32	rsvd[3];
	struct bfa_trc_s trc[BFA_TRC_MAX];
};

enum {
	BFA_TRC_HAL  = 1,	/*  BFA modules */
	BFA_TRC_FCS  = 2,	/*  BFA FCS modules */
	BFA_TRC_LDRV = 3,	/*  Linux driver modules */
	BFA_TRC_CNA  = 4,	/*  Common modules */
};
#define BFA_TRC_MOD_SH	10
#define BFA_TRC_MOD(__mod)	((BFA_TRC_ ## __mod) << BFA_TRC_MOD_SH)

/**
 * Define a new tracing file (module). Module should match one defined above.
 */
#define BFA_TRC_FILE(__mod, __submod)					\
	static int __trc_fileno = ((BFA_TRC_ ## __mod ## _ ## __submod) | \
						 BFA_TRC_MOD(__mod))


#define bfa_trc32(_trcp, _data)	\
	__bfa_trc((_trcp)->trcmod, __trc_fileno, __LINE__, (u32)_data)
#define bfa_trc(_trcp, _data)	\
	__bfa_trc((_trcp)->trcmod, __trc_fileno, __LINE__, (u64)_data)

static inline void
bfa_trc_init(struct bfa_trc_mod_s *trcm)
{
	trcm->head = trcm->tail = trcm->stopped = 0;
	trcm->ntrc = BFA_TRC_MAX;
}

static inline void
bfa_trc_stop(struct bfa_trc_mod_s *trcm)
{
	trcm->stopped = 1;
}

#ifdef FWTRC
extern void dc_flush(void *data);
#else
#define dc_flush(data)
#endif


static inline void
__bfa_trc(struct bfa_trc_mod_s *trcm, int fileno, int line, u64 data)
{
	int		tail = trcm->tail;
	struct bfa_trc_s	*trc = &trcm->trc[tail];

	if (trcm->stopped)
		return;

	trc->fileno = (u16) fileno;
	trc->line = (u16) line;
	trc->data.u64 = data;
	trc->timestamp = BFA_TRC_TS(trcm);
	dc_flush(trc);

	trcm->tail = (trcm->tail + 1) & (BFA_TRC_MAX - 1);
	if (trcm->tail == trcm->head)
		trcm->head = (trcm->head + 1) & (BFA_TRC_MAX - 1);
	dc_flush(trcm);
}


static inline void
__bfa_trc32(struct bfa_trc_mod_s *trcm, int fileno, int line, u32 data)
{
	int		tail = trcm->tail;
	struct bfa_trc_s *trc = &trcm->trc[tail];

	if (trcm->stopped)
		return;

	trc->fileno = (u16) fileno;
	trc->line = (u16) line;
	trc->data.u32.u32 = data;
	trc->timestamp = BFA_TRC_TS(trcm);
	dc_flush(trc);

	trcm->tail = (trcm->tail + 1) & (BFA_TRC_MAX - 1);
	if (trcm->tail == trcm->head)
		trcm->head = (trcm->head + 1) & (BFA_TRC_MAX - 1);
	dc_flush(trcm);
}

#ifndef BFA_PERF_BUILD
#define bfa_trc_fp(_trcp, _data)	bfa_trc(_trcp, _data)
#else
#define bfa_trc_fp(_trcp, _data)
#endif

/**
 * @ BFA LOG interfaces
 */
#define bfa_assert(__cond)	do {					\
	if (!(__cond)) {						\
		printk(KERN_ERR "assert(%s) failed at %s:%d\\n",         \
		#__cond, __FILE__, __LINE__);				\
	}								\
} while (0)

#define bfa_sm_fault(__mod, __event)	do {				\
	bfa_trc(__mod, (((u32)0xDEAD << 16) | __event));		\
	printk(KERN_ERR	"Assertion failure: %s:%d: %d",			\
		__FILE__, __LINE__, (__event));				\
} while (0)

#ifndef BFA_PERF_BUILD
#define bfa_assert_fp(__cond)	bfa_assert(__cond)
#else
#define bfa_assert_fp(__cond)
#endif

/* BFA queue definitions */
#define bfa_q_first(_q) ((void *)(((struct list_head *) (_q))->next))
#define bfa_q_next(_qe) (((struct list_head *) (_qe))->next)
#define bfa_q_prev(_qe) (((struct list_head *) (_qe))->prev)

/*
 * bfa_q_qe_init - to initialize a queue element
 */
#define bfa_q_qe_init(_qe) {				\
	bfa_q_next(_qe) = (struct list_head *) NULL;	\
	bfa_q_prev(_qe) = (struct list_head *) NULL;	\
}

/*
 * bfa_q_deq - dequeue an element from head of the queue
 */
#define bfa_q_deq(_q, _qe) {						\
	if (!list_empty(_q)) {						\
		(*((struct list_head **) (_qe))) = bfa_q_next(_q);	\
		bfa_q_prev(bfa_q_next(*((struct list_head **) _qe))) =	\
				(struct list_head *) (_q);		\
		bfa_q_next(_q) = bfa_q_next(*((struct list_head **) _qe));\
		BFA_Q_DBG_INIT(*((struct list_head **) _qe));		\
	} else {							\
		*((struct list_head **) (_qe)) = (struct list_head *) NULL;\
	}								\
}

/*
 * bfa_q_deq_tail - dequeue an element from tail of the queue
 */
#define bfa_q_deq_tail(_q, _qe) {					\
	if (!list_empty(_q)) {						\
		*((struct list_head **) (_qe)) = bfa_q_prev(_q);	\
		bfa_q_next(bfa_q_prev(*((struct list_head **) _qe))) =	\
			(struct list_head *) (_q);			\
		bfa_q_prev(_q) = bfa_q_prev(*(struct list_head **) _qe);\
		BFA_Q_DBG_INIT(*((struct list_head **) _qe));		\
	} else {							\
		*((struct list_head **) (_qe)) = (struct list_head *) NULL;\
	}								\
}

static inline int
bfa_q_is_on_q_func(struct list_head *q, struct list_head *qe)
{
	struct list_head        *tqe;

	tqe = bfa_q_next(q);
	while (tqe != q) {
		if (tqe == qe)
			return 1;
		tqe = bfa_q_next(tqe);
		if (tqe == NULL)
			break;
	}
	return 0;
}

/*
 * #ifdef BFA_DEBUG (Using bfa_assert to check for debug_build is not
 * consistent across modules)
 */
#ifndef BFA_PERF_BUILD
#define BFA_Q_DBG_INIT(_qe) bfa_q_qe_init(_qe)
#else
#define BFA_Q_DBG_INIT(_qe)
#endif

#define bfa_q_is_on_q(_q, _qe)      \
	bfa_q_is_on_q_func(_q, (struct list_head *)(_qe))

/**
 * @ BFA state machine interfaces
 */

typedef void (*bfa_sm_t)(void *sm, int event);

/**
 * oc - object class eg. bfa_ioc
 * st - state, eg. reset
 * otype - object type, eg. struct bfa_ioc_s
 * etype - object type, eg. enum ioc_event
 */
#define bfa_sm_state_decl(oc, st, otype, etype)		\
	static void oc ## _sm_ ## st(otype * fsm, etype event)

#define bfa_sm_set_state(_sm, _state)	((_sm)->sm = (bfa_sm_t)(_state))
#define bfa_sm_send_event(_sm, _event)	((_sm)->sm((_sm), (_event)))
#define bfa_sm_get_state(_sm)		((_sm)->sm)
#define bfa_sm_cmp_state(_sm, _state)	((_sm)->sm == (bfa_sm_t)(_state))

/**
 * For converting from state machine function to state encoding.
 */
struct bfa_sm_table_s {
	bfa_sm_t	sm;	/*  state machine function	*/
	int		state;	/*  state machine encoding	*/
	char		*name;	/*  state name for display	*/
};
#define BFA_SM(_sm)	((bfa_sm_t)(_sm))

/**
 * State machine with entry actions.
 */
typedef void (*bfa_fsm_t)(void *fsm, int event);

/**
 * oc - object class eg. bfa_ioc
 * st - state, eg. reset
 * otype - object type, eg. struct bfa_ioc_s
 * etype - object type, eg. enum ioc_event
 */
#define bfa_fsm_state_decl(oc, st, otype, etype)		\
	static void oc ## _sm_ ## st(otype * fsm, etype event);      \
	static void oc ## _sm_ ## st ## _entry(otype * fsm)

#define bfa_fsm_set_state(_fsm, _state) do {	\
	(_fsm)->fsm = (bfa_fsm_t)(_state);      \
	_state ## _entry(_fsm);      \
} while (0)

#define bfa_fsm_send_event(_fsm, _event)	((_fsm)->fsm((_fsm), (_event)))
#define bfa_fsm_get_state(_fsm)			((_fsm)->fsm)
#define bfa_fsm_cmp_state(_fsm, _state)		\
	((_fsm)->fsm == (bfa_fsm_t)(_state))

static inline int
bfa_sm_to_state(struct bfa_sm_table_s *smt, bfa_sm_t sm)
{
	int	i = 0;

	while (smt[i].sm && smt[i].sm != sm)
		i++;
	return smt[i].state;
}

/**
 * @ Generic wait counter.
 */

typedef void (*bfa_wc_resume_t) (void *cbarg);

struct bfa_wc_s {
	bfa_wc_resume_t wc_resume;
	void		*wc_cbarg;
	int		wc_count;
};

static inline void
bfa_wc_up(struct bfa_wc_s *wc)
{
	wc->wc_count++;
}

static inline void
bfa_wc_down(struct bfa_wc_s *wc)
{
	wc->wc_count--;
	if (wc->wc_count == 0)
		wc->wc_resume(wc->wc_cbarg);
}

/**
 * Initialize a waiting counter.
 */
static inline void
bfa_wc_init(struct bfa_wc_s *wc, bfa_wc_resume_t wc_resume, void *wc_cbarg)
{
	wc->wc_resume = wc_resume;
	wc->wc_cbarg = wc_cbarg;
	wc->wc_count = 0;
	bfa_wc_up(wc);
}

/**
 * Wait for counter to reach zero
 */
static inline void
bfa_wc_wait(struct bfa_wc_s *wc)
{
	bfa_wc_down(wc);
}

#endif /* __BFA_CS_H__ */