linux_kernel/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h

/* SPDX-License-Identifier: GPL-2.0 */
/*******************************************************************************

  Intel 10 Gigabit PCI Express Linux driver
  Copyright(c) 2017 Oracle and/or its affiliates. All rights reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program.  If not, see <http://www.gnu.org/licenses/>.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <linux.nics@intel.com>
  e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

#ifndef _IXGBE_IPSEC_H_
#define _IXGBE_IPSEC_H_

#define IXGBE_IPSEC_MAX_SA_COUNT	1024
#define IXGBE_IPSEC_MAX_RX_IP_COUNT	128
#define IXGBE_IPSEC_BASE_RX_INDEX	0
#define IXGBE_IPSEC_BASE_TX_INDEX	IXGBE_IPSEC_MAX_SA_COUNT
#define IXGBE_IPSEC_AUTH_BITS		128

#define IXGBE_RXTXIDX_IPS_EN		0x00000001
#define IXGBE_RXIDX_TBL_SHIFT		1
enum ixgbe_ipsec_tbl_sel {
	ips_rx_ip_tbl	=	0x01,
	ips_rx_spi_tbl	=	0x02,
	ips_rx_key_tbl	=	0x03,
};

#define IXGBE_RXTXIDX_IDX_SHIFT		3
#define IXGBE_RXTXIDX_READ		0x40000000
#define IXGBE_RXTXIDX_WRITE		0x80000000

#define IXGBE_RXMOD_VALID		0x00000001
#define IXGBE_RXMOD_PROTO_ESP		0x00000004
#define IXGBE_RXMOD_DECRYPT		0x00000008
#define IXGBE_RXMOD_IPV6		0x00000010

struct rx_sa {
	struct hlist_node hlist;
	struct xfrm_state *xs;
	__be32 ipaddr[4];
	u32 key[4];
	u32 salt;
	u32 mode;
	u8  iptbl_ind;
	bool used;
	bool decrypt;
};

struct rx_ip_sa {
	__be32 ipaddr[4];
	u32 ref_cnt;
	bool used;
};

struct tx_sa {
	struct xfrm_state *xs;
	u32 key[4];
	u32 salt;
	bool encrypt;
	bool used;
};

struct ixgbe_ipsec_tx_data {
	u32 flags;
	u16 trailer_len;
	u16 sa_idx;
};

struct ixgbe_ipsec {
	u16 num_rx_sa;
	u16 num_tx_sa;
	struct rx_ip_sa *ip_tbl;
	struct rx_sa *rx_tbl;
	struct tx_sa *tx_tbl;
	DECLARE_HASHTABLE(rx_sa_list, 10);
};
#endif /* _IXGBE_IPSEC_H_ */