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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / ethernet / mellanox / mlxsw / item.h
blob31c886edc79180c38d7cce239db6cfcfc61a3b14
1 /*
2 * drivers/net/ethernet/mellanox/mlxsw/item.h
3 * Copyright (c) 2015-2017 Mellanox Technologies. All rights reserved.
4 * Copyright (c) 2015-2017 Jiri Pirko <jiri@mellanox.com>
5 * Copyright (c) 2015 Ido Schimmel <idosch@mellanox.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the names of the copyright holders nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * Alternatively, this software may be distributed under the terms of the
20 * GNU General Public License ("GPL") version 2 as published by the Free
21 * Software Foundation.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #ifndef _MLXSW_ITEM_H
37 #define _MLXSW_ITEM_H
38
39 #include <linux/types.h>
40 #include <linux/string.h>
41 #include <linux/bitops.h>
42
43 struct mlxsw_item {
44 unsigned short offset; /* bytes in container */
45 short step; /* step in bytes for indexed items */
46 unsigned short in_step_offset; /* offset within one step */
47 unsigned char shift; /* shift in bits */
48 unsigned char element_size; /* size of element in bit array */
49 bool no_real_shift;
50 union {
51 unsigned char bits;
52 unsigned short bytes;
53 } size;
54 const char *name;
55 };
56
57 static inline unsigned int
58 __mlxsw_item_offset(const struct mlxsw_item *item, unsigned short index,
59 size_t typesize)
60 {
61 BUG_ON(index && !item->step);
62 if (item->offset % typesize != 0 ||
63 item->step % typesize != 0 ||
64 item->in_step_offset % typesize != 0) {
65 pr_err("mlxsw: item bug (name=%s,offset=%x,step=%x,in_step_offset=%x,typesize=%zx)\n",
66 item->name, item->offset, item->step,
67 item->in_step_offset, typesize);
68 BUG();
69 }
70
71 return ((item->offset + item->step * index + item->in_step_offset) /
72 typesize);
73 }
74
75 static inline u8 __mlxsw_item_get8(const char *buf,
76 const struct mlxsw_item *item,
77 unsigned short index)
78 {
79 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u8));
80 u8 *b = (u8 *) buf;
81 u8 tmp;
82
83 tmp = b[offset];
84 tmp >>= item->shift;
85 tmp &= GENMASK(item->size.bits - 1, 0);
86 if (item->no_real_shift)
87 tmp <<= item->shift;
88 return tmp;
89 }
90
91 static inline void __mlxsw_item_set8(char *buf, const struct mlxsw_item *item,
92 unsigned short index, u8 val)
93 {
94 unsigned int offset = __mlxsw_item_offset(item, index,
95 sizeof(u8));
96 u8 *b = (u8 *) buf;
97 u8 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
98 u8 tmp;
99
100 if (!item->no_real_shift)
101 val <<= item->shift;
102 val &= mask;
103 tmp = b[offset];
104 tmp &= ~mask;
105 tmp |= val;
106 b[offset] = tmp;
107 }
108
109 static inline u16 __mlxsw_item_get16(const char *buf,
110 const struct mlxsw_item *item,
111 unsigned short index)
112 {
113 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u16));
114 __be16 *b = (__be16 *) buf;
115 u16 tmp;
116
117 tmp = be16_to_cpu(b[offset]);
118 tmp >>= item->shift;
119 tmp &= GENMASK(item->size.bits - 1, 0);
120 if (item->no_real_shift)
121 tmp <<= item->shift;
122 return tmp;
123 }
124
125 static inline void __mlxsw_item_set16(char *buf, const struct mlxsw_item *item,
126 unsigned short index, u16 val)
127 {
128 unsigned int offset = __mlxsw_item_offset(item, index,
129 sizeof(u16));
130 __be16 *b = (__be16 *) buf;
131 u16 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
132 u16 tmp;
133
134 if (!item->no_real_shift)
135 val <<= item->shift;
136 val &= mask;
137 tmp = be16_to_cpu(b[offset]);
138 tmp &= ~mask;
139 tmp |= val;
140 b[offset] = cpu_to_be16(tmp);
141 }
142
143 static inline u32 __mlxsw_item_get32(const char *buf,
144 const struct mlxsw_item *item,
145 unsigned short index)
146 {
147 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u32));
148 __be32 *b = (__be32 *) buf;
149 u32 tmp;
150
151 tmp = be32_to_cpu(b[offset]);
152 tmp >>= item->shift;
153 tmp &= GENMASK(item->size.bits - 1, 0);
154 if (item->no_real_shift)
155 tmp <<= item->shift;
156 return tmp;
157 }
158
159 static inline void __mlxsw_item_set32(char *buf, const struct mlxsw_item *item,
160 unsigned short index, u32 val)
161 {
162 unsigned int offset = __mlxsw_item_offset(item, index,
163 sizeof(u32));
164 __be32 *b = (__be32 *) buf;
165 u32 mask = GENMASK(item->size.bits - 1, 0) << item->shift;
166 u32 tmp;
167
168 if (!item->no_real_shift)
169 val <<= item->shift;
170 val &= mask;
171 tmp = be32_to_cpu(b[offset]);
172 tmp &= ~mask;
173 tmp |= val;
174 b[offset] = cpu_to_be32(tmp);
175 }
176
177 static inline u64 __mlxsw_item_get64(const char *buf,
178 const struct mlxsw_item *item,
179 unsigned short index)
180 {
181 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
182 __be64 *b = (__be64 *) buf;
183 u64 tmp;
184
185 tmp = be64_to_cpu(b[offset]);
186 tmp >>= item->shift;
187 tmp &= GENMASK_ULL(item->size.bits - 1, 0);
188 if (item->no_real_shift)
189 tmp <<= item->shift;
190 return tmp;
191 }
192
193 static inline void __mlxsw_item_set64(char *buf, const struct mlxsw_item *item,
194 unsigned short index, u64 val)
195 {
196 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(u64));
197 __be64 *b = (__be64 *) buf;
198 u64 mask = GENMASK_ULL(item->size.bits - 1, 0) << item->shift;
199 u64 tmp;
200
201 if (!item->no_real_shift)
202 val <<= item->shift;
203 val &= mask;
204 tmp = be64_to_cpu(b[offset]);
205 tmp &= ~mask;
206 tmp |= val;
207 b[offset] = cpu_to_be64(tmp);
208 }
209
210 static inline void __mlxsw_item_memcpy_from(const char *buf, char *dst,
211 const struct mlxsw_item *item,
212 unsigned short index)
213 {
214 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
215
216 memcpy(dst, &buf[offset], item->size.bytes);
217 }
218
219 static inline void __mlxsw_item_memcpy_to(char *buf, const char *src,
220 const struct mlxsw_item *item,
221 unsigned short index)
222 {
223 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
224
225 memcpy(&buf[offset], src, item->size.bytes);
226 }
227
228 static inline char *__mlxsw_item_data(char *buf, const struct mlxsw_item *item,
229 unsigned short index)
230 {
231 unsigned int offset = __mlxsw_item_offset(item, index, sizeof(char));
232
233 return &buf[offset];
234 }
235
236 static inline u16
237 __mlxsw_item_bit_array_offset(const struct mlxsw_item *item,
238 u16 index, u8 *shift)
239 {
240 u16 max_index, be_index;
241 u16 offset; /* byte offset inside the array */
242 u8 in_byte_index;
243
244 BUG_ON(index && !item->element_size);
245 if (item->offset % sizeof(u32) != 0 ||
246 BITS_PER_BYTE % item->element_size != 0) {
247 pr_err("mlxsw: item bug (name=%s,offset=%x,element_size=%x)\n",
248 item->name, item->offset, item->element_size);
249 BUG();
250 }
251
252 max_index = (item->size.bytes << 3) / item->element_size - 1;
253 be_index = max_index - index;
254 offset = be_index * item->element_size >> 3;
255 in_byte_index = index % (BITS_PER_BYTE / item->element_size);
256 *shift = in_byte_index * item->element_size;
257
258 return item->offset + offset;
259 }
260
261 static inline u8 __mlxsw_item_bit_array_get(const char *buf,
262 const struct mlxsw_item *item,
263 u16 index)
264 {
265 u8 shift, tmp;
266 u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
267
268 tmp = buf[offset];
269 tmp >>= shift;
270 tmp &= GENMASK(item->element_size - 1, 0);
271 return tmp;
272 }
273
274 static inline void __mlxsw_item_bit_array_set(char *buf,
275 const struct mlxsw_item *item,
276 u16 index, u8 val)
277 {
278 u8 shift, tmp;
279 u16 offset = __mlxsw_item_bit_array_offset(item, index, &shift);
280 u8 mask = GENMASK(item->element_size - 1, 0) << shift;
281
282 val <<= shift;
283 val &= mask;
284 tmp = buf[offset];
285 tmp &= ~mask;
286 tmp |= val;
287 buf[offset] = tmp;
288 }
289
290 #define __ITEM_NAME(_type, _cname, _iname) \
291 mlxsw_##_type##_##_cname##_##_iname##_item
292
293 /* _type: cmd_mbox, reg, etc.
294 * _cname: containter name (e.g. command name, register name)
295 * _iname: item name within the container
296 */
297
298 #define MLXSW_ITEM8(_type, _cname, _iname, _offset, _shift, _sizebits) \
299 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
300 .offset = _offset, \
301 .shift = _shift, \
302 .size = {.bits = _sizebits,}, \
303 .name = #_type "_" #_cname "_" #_iname, \
304 }; \
305 static inline u8 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
306 { \
307 return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
308 } \
309 static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u8 val)\
310 { \
311 __mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
312 }
313
314 #define MLXSW_ITEM8_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
315 _step, _instepoffset, _norealshift) \
316 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
317 .offset = _offset, \
318 .step = _step, \
319 .in_step_offset = _instepoffset, \
320 .shift = _shift, \
321 .no_real_shift = _norealshift, \
322 .size = {.bits = _sizebits,}, \
323 .name = #_type "_" #_cname "_" #_iname, \
324 }; \
325 static inline u8 \
326 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
327 { \
328 return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), \
329 index); \
330 } \
331 static inline void \
332 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
333 u8 val) \
334 { \
335 __mlxsw_item_set8(buf, &__ITEM_NAME(_type, _cname, _iname), \
336 index, val); \
337 }
338
339 #define MLXSW_ITEM16(_type, _cname, _iname, _offset, _shift, _sizebits) \
340 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
341 .offset = _offset, \
342 .shift = _shift, \
343 .size = {.bits = _sizebits,}, \
344 .name = #_type "_" #_cname "_" #_iname, \
345 }; \
346 static inline u16 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
347 { \
348 return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
349 } \
350 static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 val)\
351 { \
352 __mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
353 }
354
355 #define MLXSW_ITEM16_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
356 _step, _instepoffset, _norealshift) \
357 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
358 .offset = _offset, \
359 .step = _step, \
360 .in_step_offset = _instepoffset, \
361 .shift = _shift, \
362 .no_real_shift = _norealshift, \
363 .size = {.bits = _sizebits,}, \
364 .name = #_type "_" #_cname "_" #_iname, \
365 }; \
366 static inline u16 \
367 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
368 { \
369 return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), \
370 index); \
371 } \
372 static inline void \
373 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
374 u16 val) \
375 { \
376 __mlxsw_item_set16(buf, &__ITEM_NAME(_type, _cname, _iname), \
377 index, val); \
378 }
379
380 #define MLXSW_ITEM32(_type, _cname, _iname, _offset, _shift, _sizebits) \
381 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
382 .offset = _offset, \
383 .shift = _shift, \
384 .size = {.bits = _sizebits,}, \
385 .name = #_type "_" #_cname "_" #_iname, \
386 }; \
387 static inline u32 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
388 { \
389 return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
390 } \
391 static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val)\
392 { \
393 __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
394 }
395
396 #define MLXSW_ITEM32_INDEXED(_type, _cname, _iname, _offset, _shift, _sizebits, \
397 _step, _instepoffset, _norealshift) \
398 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
399 .offset = _offset, \
400 .step = _step, \
401 .in_step_offset = _instepoffset, \
402 .shift = _shift, \
403 .no_real_shift = _norealshift, \
404 .size = {.bits = _sizebits,}, \
405 .name = #_type "_" #_cname "_" #_iname, \
406 }; \
407 static inline u32 \
408 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
409 { \
410 return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), \
411 index); \
412 } \
413 static inline void \
414 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
415 u32 val) \
416 { \
417 __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), \
418 index, val); \
419 }
420
421 #define MLXSW_ITEM64(_type, _cname, _iname, _offset, _shift, _sizebits) \
422 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
423 .offset = _offset, \
424 .shift = _shift, \
425 .size = {.bits = _sizebits,}, \
426 .name = #_type "_" #_cname "_" #_iname, \
427 }; \
428 static inline u64 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \
429 { \
430 return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
431 } \
432 static inline void mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u64 val)\
433 { \
434 __mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \
435 }
436
437 #define MLXSW_ITEM64_INDEXED(_type, _cname, _iname, _offset, _shift, \
438 _sizebits, _step, _instepoffset, _norealshift) \
439 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
440 .offset = _offset, \
441 .step = _step, \
442 .in_step_offset = _instepoffset, \
443 .shift = _shift, \
444 .no_real_shift = _norealshift, \
445 .size = {.bits = _sizebits,}, \
446 .name = #_type "_" #_cname "_" #_iname, \
447 }; \
448 static inline u64 \
449 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, unsigned short index)\
450 { \
451 return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), \
452 index); \
453 } \
454 static inline void \
455 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, unsigned short index, \
456 u64 val) \
457 { \
458 __mlxsw_item_set64(buf, &__ITEM_NAME(_type, _cname, _iname), \
459 index, val); \
460 }
461
462 #define MLXSW_ITEM_BUF(_type, _cname, _iname, _offset, _sizebytes) \
463 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
464 .offset = _offset, \
465 .size = {.bytes = _sizebytes,}, \
466 .name = #_type "_" #_cname "_" #_iname, \
467 }; \
468 static inline void \
469 mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf, char *dst) \
470 { \
471 __mlxsw_item_memcpy_from(buf, dst, \
472 &__ITEM_NAME(_type, _cname, _iname), 0); \
473 } \
474 static inline void \
475 mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, const char *src) \
476 { \
477 __mlxsw_item_memcpy_to(buf, src, \
478 &__ITEM_NAME(_type, _cname, _iname), 0); \
479 } \
480 static inline char * \
481 mlxsw_##_type##_##_cname##_##_iname##_data(char *buf) \
482 { \
483 return __mlxsw_item_data(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \
484 }
485
486 #define MLXSW_ITEM_BUF_INDEXED(_type, _cname, _iname, _offset, _sizebytes, \
487 _step, _instepoffset) \
488 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
489 .offset = _offset, \
490 .step = _step, \
491 .in_step_offset = _instepoffset, \
492 .size = {.bytes = _sizebytes,}, \
493 .name = #_type "_" #_cname "_" #_iname, \
494 }; \
495 static inline void \
496 mlxsw_##_type##_##_cname##_##_iname##_memcpy_from(const char *buf, \
497 unsigned short index, \
498 char *dst) \
499 { \
500 __mlxsw_item_memcpy_from(buf, dst, \
501 &__ITEM_NAME(_type, _cname, _iname), index); \
502 } \
503 static inline void \
504 mlxsw_##_type##_##_cname##_##_iname##_memcpy_to(char *buf, \
505 unsigned short index, \
506 const char *src) \
507 { \
508 __mlxsw_item_memcpy_to(buf, src, \
509 &__ITEM_NAME(_type, _cname, _iname), index); \
510 } \
511 static inline char * \
512 mlxsw_##_type##_##_cname##_##_iname##_data(char *buf, unsigned short index) \
513 { \
514 return __mlxsw_item_data(buf, \
515 &__ITEM_NAME(_type, _cname, _iname), index); \
516 }
517
518 #define MLXSW_ITEM_BIT_ARRAY(_type, _cname, _iname, _offset, _sizebytes, \
519 _element_size) \
520 static struct mlxsw_item __ITEM_NAME(_type, _cname, _iname) = { \
521 .offset = _offset, \
522 .element_size = _element_size, \
523 .size = {.bytes = _sizebytes,}, \
524 .name = #_type "_" #_cname "_" #_iname, \
525 }; \
526 static inline u8 \
527 mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf, u16 index) \
528 { \
529 return __mlxsw_item_bit_array_get(buf, \
530 &__ITEM_NAME(_type, _cname, _iname), \
531 index); \
532 } \
533 static inline void \
534 mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u16 index, u8 val) \
535 { \
536 return __mlxsw_item_bit_array_set(buf, \
537 &__ITEM_NAME(_type, _cname, _iname), \
538 index, val); \
539 } \
540
541 #endif
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