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Diffstat (limited to 'src/isa-l/raid/raid_base.c')
| -rw-r--r-- | src/isa-l/raid/raid_base.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/src/isa-l/raid/raid_base.c b/src/isa-l/raid/raid_base.c new file mode 100644 index 000000000..e066eb851 --- /dev/null +++ b/src/isa-l/raid/raid_base.c @@ -0,0 +1,147 @@ +/********************************************************************** + Copyright(c) 2011-2015 Intel Corporation All rights reserved. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * 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. + * Neither the name of Intel Corporation nor the names of its + contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + + 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. +**********************************************************************/ + +#include <limits.h> +#include <stdint.h> + +#if __WORDSIZE == 64 || _WIN64 || __x86_64__ +# define notbit0 0xfefefefefefefefeULL +# define bit7 0x8080808080808080ULL +# define gf8poly 0x1d1d1d1d1d1d1d1dULL +#else +# define notbit0 0xfefefefeUL +# define bit7 0x80808080UL +# define gf8poly 0x1d1d1d1dUL +#endif + +int pq_gen_base(int vects, int len, void **array) +{ + int i, j; + unsigned long p, q, s; + unsigned long **src = (unsigned long **)array; + int blocks = len / sizeof(long); + + for (i = 0; i < blocks; i++) { + q = p = src[vects - 3][i]; + + for (j = vects - 4; j >= 0; j--) { + p ^= s = src[j][i]; + q = s ^ (((q << 1) & notbit0) ^ // shift each byte + ((((q & bit7) << 1) - ((q & bit7) >> 7)) // mask out bytes + & gf8poly)); // apply poly + } + + src[vects - 2][i] = p; // second to last pointer is p + src[vects - 1][i] = q; // last pointer is q + } + return 0; +} + +int pq_check_base(int vects, int len, void **array) +{ + int i, j; + unsigned char p, q, s; + unsigned char **src = (unsigned char **)array; + + for (i = 0; i < len; i++) { + q = p = src[vects - 3][i]; + + for (j = vects - 4; j >= 0; j--) { + s = src[j][i]; + p ^= s; + + // mult by GF{2} + q = s ^ ((q << 1) ^ ((q & 0x80) ? 0x1d : 0)); + } + + if (src[vects - 2][i] != p) // second to last pointer is p + return i | 1; + if (src[vects - 1][i] != q) // last pointer is q + return i | 2; + } + return 0; +} + +int xor_gen_base(int vects, int len, void **array) +{ + int i, j; + unsigned char parity; + unsigned char **src = (unsigned char **)array; + + for (i = 0; i < len; i++) { + parity = src[0][i]; + for (j = 1; j < vects - 1; j++) + parity ^= src[j][i]; + + src[vects - 1][i] = parity; // last pointer is dest + + } + + return 0; +} + +int xor_check_base(int vects, int len, void **array) +{ + int i, j, fail = 0; + + unsigned char parity; + unsigned char **src = (unsigned char **)array; + + for (i = 0; i < len; i++) { + parity = 0; + for (j = 0; j < vects; j++) + parity ^= src[j][i]; + + if (parity != 0) { + fail = 1; + break; + } + } + if (fail && len > 0) + return len; + return fail; +} + +struct slver { + unsigned short snum; + unsigned char ver; + unsigned char core; +}; + +struct slver pq_gen_base_slver_0001012a; +struct slver pq_gen_base_slver = { 0x012a, 0x01, 0x00 }; + +struct slver xor_gen_base_slver_0001012b; +struct slver xor_gen_base_slver = { 0x012b, 0x01, 0x00 }; + +struct slver pq_check_base_slver_0001012c; +struct slver pq_check_base_slver = { 0x012c, 0x01, 0x00 }; + +struct slver xor_check_base_slver_0001012d; +struct slver xor_check_base_slver = { 0x012d, 0x01, 0x00 }; |