/* * This file is part of the Chelsio T6 Crypto driver for Linux. * * Copyright (c) 2003-2017 Chelsio Communications, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * 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. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * Written and Maintained by: * Atul Gupta ([email protected]) */ #define pr_fmt(fmt) … #include <linux/kernel.h> #include <linux/module.h> #include <linux/skbuff.h> #include <linux/rtnetlink.h> #include <linux/highmem.h> #include <linux/if_vlan.h> #include <linux/ip.h> #include <linux/netdevice.h> #include <net/esp.h> #include <net/xfrm.h> #include <crypto/aes.h> #include <crypto/hash.h> #include <crypto/sha1.h> #include <crypto/sha2.h> #include <crypto/authenc.h> #include <crypto/internal/aead.h> #include <crypto/null.h> #include <crypto/internal/skcipher.h> #include <crypto/aead.h> #include <crypto/scatterwalk.h> #include <crypto/internal/hash.h> #include "chcr_ipsec.h" /* * Max Tx descriptor space we allow for an Ethernet packet to be inlined * into a WR. */ #define MAX_IMM_TX_PKT_LEN … #define GCM_ESP_IV_SIZE … static LIST_HEAD(uld_ctx_list); static DEFINE_MUTEX(dev_mutex); static bool ch_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x); static int ch_ipsec_uld_state_change(void *handle, enum cxgb4_state new_state); static int ch_ipsec_xmit(struct sk_buff *skb, struct net_device *dev); static void *ch_ipsec_uld_add(const struct cxgb4_lld_info *infop); static void ch_ipsec_advance_esn_state(struct xfrm_state *x); static void ch_ipsec_xfrm_free_state(struct xfrm_state *x); static void ch_ipsec_xfrm_del_state(struct xfrm_state *x); static int ch_ipsec_xfrm_add_state(struct xfrm_state *x, struct netlink_ext_ack *extack); static const struct xfrmdev_ops ch_ipsec_xfrmdev_ops = …; static struct cxgb4_uld_info ch_ipsec_uld_info = …; static void *ch_ipsec_uld_add(const struct cxgb4_lld_info *infop) { … } static int ch_ipsec_uld_state_change(void *handle, enum cxgb4_state new_state) { … } static int ch_ipsec_setauthsize(struct xfrm_state *x, struct ipsec_sa_entry *sa_entry) { … } static int ch_ipsec_setkey(struct xfrm_state *x, struct ipsec_sa_entry *sa_entry) { … } /* * ch_ipsec_xfrm_add_state * returns 0 on success, negative error if failed to send message to FPGA * positive error if FPGA returned a bad response */ static int ch_ipsec_xfrm_add_state(struct xfrm_state *x, struct netlink_ext_ack *extack) { … } static void ch_ipsec_xfrm_del_state(struct xfrm_state *x) { … } static void ch_ipsec_xfrm_free_state(struct xfrm_state *x) { … } static bool ch_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *x) { … } static void ch_ipsec_advance_esn_state(struct xfrm_state *x) { … } static int is_eth_imm(const struct sk_buff *skb, struct ipsec_sa_entry *sa_entry) { … } static unsigned int calc_tx_sec_flits(const struct sk_buff *skb, struct ipsec_sa_entry *sa_entry, bool *immediate) { … } static void *copy_esn_pktxt(struct sk_buff *skb, struct net_device *dev, void *pos, struct ipsec_sa_entry *sa_entry) { … } static void *copy_cpltx_pktxt(struct sk_buff *skb, struct net_device *dev, void *pos, struct ipsec_sa_entry *sa_entry) { … } static void *copy_key_cpltx_pktxt(struct sk_buff *skb, struct net_device *dev, void *pos, struct ipsec_sa_entry *sa_entry) { … } static void *ch_ipsec_crypto_wreq(struct sk_buff *skb, struct net_device *dev, void *pos, int credits, struct ipsec_sa_entry *sa_entry) { … } /** * flits_to_desc - returns the num of Tx descriptors for the given flits * @n: the number of flits * * Returns the number of Tx descriptors needed for the supplied number * of flits. */ static unsigned int flits_to_desc(unsigned int n) { … } static unsigned int txq_avail(const struct sge_txq *q) { … } static void eth_txq_stop(struct sge_eth_txq *q) { … } static void txq_advance(struct sge_txq *q, unsigned int n) { … } /* * ch_ipsec_xmit called from ULD Tx handler */ int ch_ipsec_xmit(struct sk_buff *skb, struct net_device *dev) { … } static int __init ch_ipsec_init(void) { … } static void __exit ch_ipsec_exit(void) { … } module_init(…) …; module_exit(ch_ipsec_exit); MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_VERSION(…);
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