linux/drivers/infiniband/sw/rxe/rxe_icrc.c

// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
/*
 * Copyright (c) 2016 Mellanox Technologies Ltd. All rights reserved.
 * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved.
 */

#include <linux/crc32.h>

#include "rxe.h"
#include "rxe_loc.h"

/**
 * rxe_icrc_init() - Initialize crypto function for computing crc32
 * @rxe: rdma_rxe device object
 *
 * Return: 0 on success else an error
 */
int rxe_icrc_init(struct rxe_dev *rxe)
{ … }

/**
 * rxe_crc32() - Compute cumulative crc32 for a contiguous segment
 * @rxe: rdma_rxe device object
 * @crc: starting crc32 value from previous segments
 * @next: starting address of current segment
 * @len: length of current segment
 *
 * Return: the cumulative crc32 checksum
 */
static __be32 rxe_crc32(struct rxe_dev *rxe, __be32 crc, void *next, size_t len)
{ … }

/**
 * rxe_icrc_hdr() - Compute the partial ICRC for the network and transport
 *		  headers of a packet.
 * @skb: packet buffer
 * @pkt: packet information
 *
 * Return: the partial ICRC
 */
static __be32 rxe_icrc_hdr(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{ … }

/**
 * rxe_icrc_check() - Compute ICRC for a packet and compare to the ICRC
 *		      delivered in the packet.
 * @skb: packet buffer
 * @pkt: packet information
 *
 * Return: 0 if the values match else an error
 */
int rxe_icrc_check(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{ … }

/**
 * rxe_icrc_generate() - compute ICRC for a packet.
 * @skb: packet buffer
 * @pkt: packet information
 */
void rxe_icrc_generate(struct sk_buff *skb, struct rxe_pkt_info *pkt)
{ … }