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Vendor Unique iSCSI CRC32C

264 T10000: Interface Reference Manual August 2016

int align;

int length;

/* calc crc for unaligned memory addresses */

if ((align = ((intptr_t)addr & CRC32C_ALIGN)) > 0) {

align = CRC32C_SIZE - align;

align = (align > len) ? len : align;

crc = calc_crc32c_sw((char *)addr, align, crc);

crc ^= CRC32C_XOR;

addr = &addr[align];

len -= align;

}

/* calc crc for word aligned memory addresses */

if ((length = len / CRC32C_SIZE) > 0) {

uint64_t lcrc = crc;

uint64_t *data = (uint64_t *)addr;

_t4_crc32c(&lcrc, data, length);

crc = (uint32_t)lcrc;

addr = (uint8_t *)&data[length];

len -= length * CRC32C_SIZE;

}

/* calculate crc for remaining data */

if (len > 0) {

crc = calc_crc32c_sw((char *)addr, len, crc);

return (crc);

}

return (crc ^ CRC32C_XOR);

}

#endif

Oracle StorageTek T10000 Reference Manual

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