488570ebd4
Many open source projects have moved to using SPDX identifiers to specify license information, reducing the amount of boilerplate code in every source file. This patch replaces the bulk of SPDK .c, .cpp and Makefiles with the BSD-3-Clause identifier. Almost all of these files share the exact same license text, and this patch only modifies the files that contain the most common license text. There can be slight variations because the third clause contains company names - most say "Intel Corporation", but there are instances for Nvidia, Samsung, Eideticom and even "the copyright holder". Used a bash script to automate replacement of the license text with SPDX identifier which is checked into scripts/spdx.sh. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: Iaa88ab5e92ea471691dc298cfe41ebfb5d169780 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/12904 Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com> Community-CI: Mellanox Build Bot Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com> Reviewed-by: Changpeng Liu <changpeng.liu@intel.com> Reviewed-by: Dong Yi <dongx.yi@intel.com> Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com> Reviewed-by: Paul Luse <paul.e.luse@intel.com> Reviewed-by: <qun.wan@intel.com>
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*/
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#include "util_internal.h"
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#include "spdk/crc32.h"
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#ifdef SPDK_CONFIG_ISAL
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#define SPDK_HAVE_ISAL
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#include <isa-l/include/crc.h>
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#elif defined(__aarch64__) && defined(__ARM_FEATURE_CRC32)
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#define SPDK_HAVE_ARM_CRC
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#include <arm_acle.h>
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#elif defined(__x86_64__) && defined(__SSE4_2__)
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#define SPDK_HAVE_SSE4_2
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#include <x86intrin.h>
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#endif
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#ifdef SPDK_HAVE_ISAL
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uint32_t
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spdk_crc32c_update(const void *buf, size_t len, uint32_t crc)
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{
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return crc32_iscsi((unsigned char *)buf, len, crc);
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}
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#elif defined(SPDK_HAVE_SSE4_2)
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uint32_t
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spdk_crc32c_update(const void *buf, size_t len, uint32_t crc)
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{
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uint64_t crc_tmp64;
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size_t count;
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/* _mm_crc32_u64() needs a 64-bit intermediate value */
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crc_tmp64 = crc;
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/* Process as much of the buffer as possible in 64-bit blocks. */
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count = len / 8;
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while (count--) {
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uint64_t block;
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/*
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* Use memcpy() to avoid unaligned loads, which are undefined behavior in C.
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* The compiler will optimize out the memcpy() in release builds.
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*/
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memcpy(&block, buf, sizeof(block));
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crc_tmp64 = _mm_crc32_u64(crc_tmp64, block);
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buf += sizeof(block);
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}
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crc = (uint32_t)crc_tmp64;
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/* Handle any trailing bytes. */
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count = len & 7;
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while (count--) {
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crc = _mm_crc32_u8(crc, *(const uint8_t *)buf);
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buf++;
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}
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return crc;
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}
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#elif defined(SPDK_HAVE_ARM_CRC)
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uint32_t
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spdk_crc32c_update(const void *buf, size_t len, uint32_t crc)
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{
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size_t count;
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count = len / 8;
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while (count--) {
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uint64_t block;
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memcpy(&block, buf, sizeof(block));
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crc = __crc32cd(crc, block);
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buf += sizeof(block);
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}
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count = len & 7;
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while (count--) {
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crc = __crc32cb(crc, *(const uint8_t *)buf);
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buf++;
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}
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return crc;
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}
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#else /* Neither SSE 4.2 nor ARM CRC32 instructions available */
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static struct spdk_crc32_table g_crc32c_table;
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__attribute__((constructor)) static void
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crc32c_init(void)
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{
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crc32_table_init(&g_crc32c_table, SPDK_CRC32C_POLYNOMIAL_REFLECT);
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}
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uint32_t
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spdk_crc32c_update(const void *buf, size_t len, uint32_t crc)
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{
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return crc32_update(&g_crc32c_table, buf, len, crc);
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}
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#endif
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uint32_t
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spdk_crc32c_iov_update(struct iovec *iov, int iovcnt, uint32_t crc32c)
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{
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int i;
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if (iov == NULL) {
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return crc32c;
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}
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for (i = 0; i < iovcnt; i++) {
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assert(iov[i].iov_base != NULL);
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assert(iov[i].iov_len != 0);
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crc32c = spdk_crc32c_update(iov[i].iov_base, iov[i].iov_len, crc32c);
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}
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return crc32c;
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}
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