summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/mellanox/mlxsw/item.h
blob: 28427f0758c7ed3ddb35870aee9e450cc451151a (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
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
/*
 * drivers/net/ethernet/mellanox/mlxsw/item.h
 * Copyright (c) 2015-2017 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2015-2017 Jiri Pirko <jiri@mellanox.com>
 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef _MLXSW_ITEM_H
#define _MLXSW_ITEM_H

#include <linux/types.h>
#include <linux/string.h>
#include <linux/bitops.h>

struct mlxsw_item {
	unsigned short	offset;		/* bytes in container */
	unsigned short	step;		/* step in bytes for indexed items */
	unsigned short	in_step_offset; /* offset within one step */
	unsigned char	shift;		/* shift in bits */
	unsigned char	element_size;	/* size of element in bit array */
	bool		no_real_shift;
	union {
		unsigned char	bits;
		unsigned short	bytes;
	} size;
	const char	*name;
};

static inline unsigned int
__mlxsw_item_offset(const struct mlxsw_item *item, unsigned short index,
		    size_t typesize)
{
	BUG_ON(index && !item->step);
	if (item->offset % typesize != 0 ||
	    item->step % typesize != 0 ||
	    item->in_step_offset % typesize != 0) {
		pr_err("mlxsw: item bug (name=%s,offset=%x,step=%x,in_step_offset=%x,typesize=%zx)\n",
		       item->name, item->offset, item->step,
		       item->in_step_offset, typesize);
		BUG();
	}

	return ((item->offset + item->step * index + item->in_step_offset) /
		typesize);
}

static inline u8 __mlxsw_item_get8(const char *buf,
				   const struct mlxsw_item *item,
				   unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u8));
	u8 *b = (u8 *) buf;
	u8 tmp;

	tmp = b[offset];
	tmp >>= item->shift;
	tmp &= GENMASK(item->size.bits - 1, 0);
	if (item->no_real_shift)
		tmp <<= item->shift;
	return tmp;
}

static inline void __mlxsw_item_set8(char *buf, const struct mlxsw_item *item,
				     unsigned short index, u8 val)
{
	unsigned int offset = __mlxsw_item_offset(item, index,
						  sizeof(u8));
	u8 *b = (u8 *) buf;
	u8 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
	u8 tmp;

	if (!item->no_real_shift)
		val <<= item->shift;
	val &= mask;
	tmp = b[offset];
	tmp &= ~mask;
	tmp |= val;
	b[offset] = tmp;
}

static inline u16 __mlxsw_item_get16(const char *buf,
				     const struct mlxsw_item *item,
				     unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u16));
	__be16 *b = (__be16 *) buf;
	u16 tmp;

	tmp = be16_to_cpu(b[offset]);
	tmp >>= item->shift;
	tmp &= GENMASK(item->size.bits - 1, 0);
	if (item->no_real_shift)
		tmp <<= item->shift;
	return tmp;
}

static inline void __mlxsw_item_set16(char *buf, const struct mlxsw_item *item,
				      unsigned short index, u16 val)
{
	unsigned int offset = __mlxsw_item_offset(item, index,
						  sizeof(u16));
	__be16 *b = (__be16 *) buf;
	u16 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
	u16 tmp;

	if (!item->no_real_shift)
		val <<= item->shift;
	val &= mask;
	tmp = be16_to_cpu(b[offset]);
	tmp &= ~mask;
	tmp |= val;
	b[offset] = cpu_to_be16(tmp);
}

static inline u32 __mlxsw_item_get32(const char *buf,
				     const struct mlxsw_item *item,
				     unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u32));
	__be32 *b = (__be32 *) buf;
	u32 tmp;

	tmp = be32_to_cpu(b[offset]);
	tmp >>= item->shift;
	tmp &= GENMASK(item->size.bits - 1, 0);
	if (item->no_real_shift)
		tmp <<= item->shift;
	return tmp;
}

static inline void __mlxsw_item_set32(char *buf, const struct mlxsw_item *item,
				      unsigned short index, u32 val)
{
	unsigned int offset = __mlxsw_item_offset(item, index,
						  sizeof(u32));
	__be32 *b = (__be32 *) buf;
	u32 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
	u32 tmp;

	if (!item->no_real_shift)
		val <<= item->shift;
	val &= mask;
	tmp = be32_to_cpu(b[offset]);
	tmp &= ~mask;
	tmp |= val;
	b[offset] = cpu_to_be32(tmp);
}

static inline u64 __mlxsw_item_get64(const char *buf,
				     const struct mlxsw_item *item,
				     unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
	__be64 *b = (__be64 *) buf;
	u64 tmp;

	tmp = be64_to_cpu(b[offset]);
	tmp >>= item->shift;
	tmp &= GENMASK_ULL(item->size.bits - 1, 0);
	if (item->no_real_shift)
		tmp <<= item->shift;
	return tmp;
}

static inline void __mlxsw_item_set64(char *buf, const struct mlxsw_item *item,
				      unsigned short index, u64 val)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
	__be64 *b = (__be64 *) buf;
	u64 mask = GENMASK_ULL(item->size.bits - 1, 0) << item->shift;
	u64 tmp;

	if (!item->no_real_shift)
		val <<= item->shift;
	val &= mask;
	tmp = be64_to_cpu(b[offset]);
	tmp &= ~mask;
	tmp |= val;
	b[offset] = cpu_to_be64(tmp);
}

static inline void __mlxsw_item_memcpy_from(const char *buf, char *dst,
					    const struct mlxsw_item *item,
					    unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));

	memcpy(dst, &buf[offset], item->size.bytes);
}

static inline void __mlxsw_item_memcpy_to(char *buf, const char *src,
					  const struct mlxsw_item *item,
					  unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));

	memcpy(&buf[offset], src, item->size.bytes);
}

static inline char *__mlxsw_item_data(char *buf, const struct mlxsw_item *item,
				      unsigned short index)
{
	unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));

	return &buf[offset];
}

static inline u16
__mlxsw_item_bit_array_offset(const struct mlxsw_item *item,
			      u16 index, u8 *shift)
{
	u16 max_index, be_index;
	u16 offset;		/* byte offset inside the array */
	u8 in_byte_index;

	BUG_ON(index && !item->element_size);
	if (item->offset % sizeof(u32) != 0 ||
	    BITS_PER_BYTE % item->element_size != 0) {
		pr_err("mlxsw: item bug (name=%s,offset=%x,element_size=%x)\n",
		       item->name, item->offset, item->element_size);
		BUG();
	}

	max_index = (item->size.bytes << 3) / item->element_size - 1;
	be_index = max_index - index;
	offset = be_index * item->element_size >> 3;
	in_byte_index  = index % (BITS_PER_BYTE / item->element_size);
	*shift = in_byte_index * item->element_size;

	return item->offset + offset;
}

static inline u8 __mlxsw_item_bit_array_get(const char *buf,
					    const struct mlxsw_item *item,
					    u16 index)
{
	u8 shift, tmp;
	u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);

	tmp = buf[offset];
	tmp >>= shift;
	tmp &= GENMASK(item->element_size - 1, 0);
	return tmp;
}

static inline void __mlxsw_item_bit_array_set(char *buf,
					      const struct mlxsw_item *item,
					      u16 index, u8 val)
{
	u8 shift, tmp;
	u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
	u8 mask = GENMASK(item->element_size - 1, 0) << shift;

	val <<= shift;
	val &= mask;
	tmp = buf[offset];
	tmp &= ~mask;
	tmp |= val;
	buf[offset] = tmp;
}

#define __ITEM_NAME(_type, _cname, _iname)					\
	mlxsw_##_type##_##_cname##_##_iname##_item

/* _type: cmd_mbox, reg, etc.
 * _cname: containter name (e.g. command name, register name)
 * _iname: item name within the container
 */

#define MLXSW_ITEM8(_type, _cname, _iname, _offset, _shift, _sizebits)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.shift = _shift,							\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u8 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
{										\
	return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
}										\
static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u8 val)\
{										\
	__mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val);	\
}

#define MLXSW_ITEM8_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits,	\
			    _step, _instepoffset, _norealshift)			\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.step = _step,								\
	.in_step_offset = _instepoffset,					\
	.shift = _shift,							\
	.no_real_shift = _norealshift,						\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u8								\
mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
{										\
	return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname),	\
				 index);					\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
					  u8 val)				\
{										\
	__mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname),		\
			  index, val);						\
}

#define MLXSW_ITEM16(_type, _cname, _iname, _offset, _shift, _sizebits)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.shift = _shift,							\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u16 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
{										\
	return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
}										\
static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val)\
{										\
	__mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val);	\
}

#define MLXSW_ITEM16_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits,	\
			     _step, _instepoffset, _norealshift)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.step = _step,								\
	.in_step_offset = _instepoffset,					\
	.shift = _shift,							\
	.no_real_shift = _norealshift,						\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u16								\
mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
{										\
	return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname),	\
				  index);					\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
					  u16 val)				\
{										\
	__mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname),		\
			   index, val);						\
}

#define MLXSW_ITEM32(_type, _cname, _iname, _offset, _shift, _sizebits)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.shift = _shift,							\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u32 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
{										\
	return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
}										\
static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val)\
{										\
	__mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val);	\
}

#define MLXSW_ITEM32_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits,	\
			     _step, _instepoffset, _norealshift)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.step = _step,								\
	.in_step_offset = _instepoffset,					\
	.shift = _shift,							\
	.no_real_shift = _norealshift,						\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u32								\
mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
{										\
	return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname),	\
				  index);					\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
					  u32 val)				\
{										\
	__mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname),		\
			   index, val);						\
}

#define MLXSW_ITEM64(_type, _cname, _iname, _offset, _shift, _sizebits)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.shift = _shift,							\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u64 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf)	\
{										\
	return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
}										\
static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u64 val)\
{										\
	__mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), 0,	val);	\
}

#define MLXSW_ITEM64_INDEXED(_type, _cname, _iname, _offset, _shift,		\
			     _sizebits, _step, _instepoffset, _norealshift)	\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.step = _step,								\
	.in_step_offset = _instepoffset,					\
	.shift = _shift,							\
	.no_real_shift = _norealshift,						\
	.size = {.bits = _sizebits,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u64								\
mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
{										\
	return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname),	\
				  index);					\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index,	\
					  u64 val)				\
{										\
	__mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname),		\
			   index, val);						\
}

#define MLXSW_ITEM_BUF(_type, _cname, _iname, _offset, _sizebytes)		\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.size = {.bytes = _sizebytes,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf, char *dst)	\
{										\
	__mlxsw_item_memcpy_from(buf, dst,					\
				 &__ITEM_NAME(_type, _cname, _iname), 0);	\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, const char *src)	\
{										\
	__mlxsw_item_memcpy_to(buf, src,					\
			       &__ITEM_NAME(_type, _cname, _iname), 0);		\
}										\
static inline char *								\
mlxsw_##_type##_##_cname##_##_iname##_data(char *buf)				\
{										\
	return __mlxsw_item_data(buf, &__ITEM_NAME(_type, _cname, _iname), 0);	\
}

#define MLXSW_ITEM_BUF_INDEXED(_type, _cname, _iname, _offset, _sizebytes,	\
			       _step, _instepoffset)				\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.step = _step,								\
	.in_step_offset = _instepoffset,					\
	.size = {.bytes = _sizebytes,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf,		\
						  unsigned short index,		\
						  char *dst)			\
{										\
	__mlxsw_item_memcpy_from(buf, dst,					\
				 &__ITEM_NAME(_type, _cname, _iname), index);	\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf,			\
						unsigned short index,		\
						const char *src)		\
{										\
	__mlxsw_item_memcpy_to(buf, src,					\
			       &__ITEM_NAME(_type, _cname, _iname), index);	\
}										\
static inline char *								\
mlxsw_##_type##_##_cname##_##_iname##_data(char *buf, unsigned short index)	\
{										\
	return __mlxsw_item_data(buf,						\
				 &__ITEM_NAME(_type, _cname, _iname), index);	\
}

#define MLXSW_ITEM_BIT_ARRAY(_type, _cname, _iname, _offset, _sizebytes,	\
			     _element_size)					\
static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = {			\
	.offset = _offset,							\
	.element_size = _element_size,						\
	.size = {.bytes = _sizebytes,},						\
	.name = #_type "_" #_cname "_" #_iname,					\
};										\
static inline u8								\
mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, u16 index)		\
{										\
	return __mlxsw_item_bit_array_get(buf,					\
					  &__ITEM_NAME(_type, _cname, _iname),	\
					  index);				\
}										\
static inline void								\
mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 index, u8 val)		\
{										\
	return __mlxsw_item_bit_array_set(buf,					\
					  &__ITEM_NAME(_type, _cname, _iname),	\
					  index, val);				\
}										\

#endif