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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 | /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ /* Copyright (c) 2015-2018 Mellanox Technologies. All rights reserved */ #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 */ 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 __maybe_unused \ mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \ { \ return __mlxsw_item_get8(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ } \ static inline void __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \ { \ return __mlxsw_item_get16(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ } \ static inline void __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \ { \ return __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ } \ static inline void __maybe_unused \ mlxsw_##_type##_##_cname##_##_iname##_set(char *buf, u32 val) \ { \ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, _iname), 0, val); \ } #define LOCAL_PORT_LSB_SIZE 8 #define LOCAL_PORT_MSB_SIZE 2 #define MLXSW_ITEM32_LP(_type, _cname, _offset1, _shift1, _offset2, _shift2) \ static struct mlxsw_item __ITEM_NAME(_type, _cname, local_port) = { \ .offset = _offset1, \ .shift = _shift1, \ .size = {.bits = LOCAL_PORT_LSB_SIZE,}, \ .name = #_type "_" #_cname "_local_port", \ }; \ static struct mlxsw_item __ITEM_NAME(_type, _cname, lp_msb) = { \ .offset = _offset2, \ .shift = _shift2, \ .size = {.bits = LOCAL_PORT_MSB_SIZE,}, \ .name = #_type "_" #_cname "_lp_msb", \ }; \ static inline u32 __maybe_unused \ mlxsw_##_type##_##_cname##_local_port_get(const char *buf) \ { \ u32 local_port, lp_msb; \ \ local_port = __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, \ local_port), 0); \ lp_msb = __mlxsw_item_get32(buf, &__ITEM_NAME(_type, _cname, lp_msb), \ 0); \ return (lp_msb << LOCAL_PORT_LSB_SIZE) + local_port; \ } \ static inline void __maybe_unused \ mlxsw_##_type##_##_cname##_local_port_set(char *buf, u32 val) \ { \ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, local_port), 0, \ val & ((1 << LOCAL_PORT_LSB_SIZE) - 1)); \ __mlxsw_item_set32(buf, &__ITEM_NAME(_type, _cname, lp_msb), 0, \ val >> LOCAL_PORT_LSB_SIZE); \ } #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 __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ mlxsw_##_type##_##_cname##_##_iname##_get(const char *buf) \ { \ return __mlxsw_item_get64(buf, &__ITEM_NAME(_type, _cname, _iname), 0); \ } \ static inline void __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 * __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 * __maybe_unused \ 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 __maybe_unused \ 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 __maybe_unused \ 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 |