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ixgbe: add ipsec register access routines

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Add a few routines to make access to the ipsec registers just a little
easier, and throw in the beginnings of an initialization.

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shannon Nelson 2017-12-19 15:59:54 -08:00 committed by Jeff Kirsher
parent beca815403
commit 8bbbc5e90b
5 changed files with 222 additions and 0 deletions
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1
drivers/net/ethernet/intel/ixgbe/Makefile
View File

@ -42,3 +42,4 @@ ixgbe-$(CONFIG_IXGBE_DCB) += ixgbe_dcb.o ixgbe_dcb_82598.o \
ixgbe-$(CONFIG_IXGBE_HWMON) += ixgbe_sysfs.o
ixgbe-$(CONFIG_DEBUG_FS) += ixgbe_debugfs.o
ixgbe-$(CONFIG_FCOE:m=y) += ixgbe_fcoe.o
ixgbe-$(CONFIG_XFRM_OFFLOAD) += ixgbe_ipsec.o

6
drivers/net/ethernet/intel/ixgbe/ixgbe.h
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@ -52,6 +52,7 @@
#ifdef CONFIG_IXGBE_DCA
#include <linux/dca.h>
#endif
#include "ixgbe_ipsec.h"
#include <net/xdp.h>
#include <net/busy_poll.h>
@ -1011,4 +1012,9 @@ void ixgbe_store_key(struct ixgbe_adapter *adapter);
void ixgbe_store_reta(struct ixgbe_adapter *adapter);
s32 ixgbe_negotiate_fc(struct ixgbe_hw *hw, u32 adv_reg, u32 lp_reg,
u32 adv_sym, u32 adv_asm, u32 lp_sym, u32 lp_asm);
#ifdef CONFIG_XFRM_OFFLOAD
void ixgbe_init_ipsec_offload(struct ixgbe_adapter *adapter);
#else
static inline void ixgbe_init_ipsec_offload(struct ixgbe_adapter *adapter) { };
#endif /* CONFIG_XFRM_OFFLOAD */
#endif /* _IXGBE_H_ */

161
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c Normal file
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@ -0,0 +1,161 @@
/*******************************************************************************
*
* 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
*
******************************************************************************/
#include "ixgbe.h"
/**
* ixgbe_ipsec_set_tx_sa - set the Tx SA registers
* @hw: hw specific details
* @idx: register index to write
* @key: key byte array
* @salt: salt bytes
**/
static void ixgbe_ipsec_set_tx_sa(struct ixgbe_hw *hw, u16 idx,
u32 key[], u32 salt)
{
u32 reg;
int i;
for (i = 0; i < 4; i++)
IXGBE_WRITE_REG(hw, IXGBE_IPSTXKEY(i), cpu_to_be32(key[3 - i]));
IXGBE_WRITE_REG(hw, IXGBE_IPSTXSALT, cpu_to_be32(salt));
IXGBE_WRITE_FLUSH(hw);
reg = IXGBE_READ_REG(hw, IXGBE_IPSTXIDX);
reg &= IXGBE_RXTXIDX_IPS_EN;
reg |= idx << IXGBE_RXTXIDX_IDX_SHIFT | IXGBE_RXTXIDX_WRITE;
IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, reg);
IXGBE_WRITE_FLUSH(hw);
}
/**
* ixgbe_ipsec_set_rx_item - set an Rx table item
* @hw: hw specific details
* @idx: register index to write
* @tbl: table selector
*
* Trigger the device to store into a particular Rx table the
* data that has already been loaded into the input register
**/
static void ixgbe_ipsec_set_rx_item(struct ixgbe_hw *hw, u16 idx,
enum ixgbe_ipsec_tbl_sel tbl)
{
u32 reg;
reg = IXGBE_READ_REG(hw, IXGBE_IPSRXIDX);
reg &= IXGBE_RXTXIDX_IPS_EN;
reg |= tbl << IXGBE_RXIDX_TBL_SHIFT |
idx << IXGBE_RXTXIDX_IDX_SHIFT |
IXGBE_RXTXIDX_WRITE;
IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, reg);
IXGBE_WRITE_FLUSH(hw);
}
/**
* ixgbe_ipsec_set_rx_sa - set up the register bits to save SA info
* @hw: hw specific details
* @idx: register index to write
* @spi: security parameter index
* @key: key byte array
* @salt: salt bytes
* @mode: rx decrypt control bits
* @ip_idx: index into IP table for related IP address
**/
static void ixgbe_ipsec_set_rx_sa(struct ixgbe_hw *hw, u16 idx, __be32 spi,
u32 key[], u32 salt, u32 mode, u32 ip_idx)
{
int i;
/* store the SPI (in bigendian) and IPidx */
IXGBE_WRITE_REG(hw, IXGBE_IPSRXSPI, cpu_to_le32(spi));
IXGBE_WRITE_REG(hw, IXGBE_IPSRXIPIDX, ip_idx);
IXGBE_WRITE_FLUSH(hw);
ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_spi_tbl);
/* store the key, salt, and mode */
for (i = 0; i < 4; i++)
IXGBE_WRITE_REG(hw, IXGBE_IPSRXKEY(i), cpu_to_be32(key[3 - i]));
IXGBE_WRITE_REG(hw, IXGBE_IPSRXSALT, cpu_to_be32(salt));
IXGBE_WRITE_REG(hw, IXGBE_IPSRXMOD, mode);
IXGBE_WRITE_FLUSH(hw);
ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_key_tbl);
}
/**
* ixgbe_ipsec_set_rx_ip - set up the register bits to save SA IP addr info
* @hw: hw specific details
* @idx: register index to write
* @addr: IP address byte array
**/
static void ixgbe_ipsec_set_rx_ip(struct ixgbe_hw *hw, u16 idx, __be32 addr[])
{
int i;
/* store the ip address */
for (i = 0; i < 4; i++)
IXGBE_WRITE_REG(hw, IXGBE_IPSRXIPADDR(i), cpu_to_le32(addr[i]));
IXGBE_WRITE_FLUSH(hw);
ixgbe_ipsec_set_rx_item(hw, idx, ips_rx_ip_tbl);
}
/**
* ixgbe_ipsec_clear_hw_tables - because some tables don't get cleared on reset
* @adapter: board private structure
**/
static void ixgbe_ipsec_clear_hw_tables(struct ixgbe_adapter *adapter)
{
struct ixgbe_hw *hw = &adapter->hw;
u32 buf[4] = {0, 0, 0, 0};
u16 idx;
/* disable Rx and Tx SA lookup */
IXGBE_WRITE_REG(hw, IXGBE_IPSRXIDX, 0);
IXGBE_WRITE_REG(hw, IXGBE_IPSTXIDX, 0);
/* scrub the tables - split the loops for the max of the IP table */
for (idx = 0; idx < IXGBE_IPSEC_MAX_RX_IP_COUNT; idx++) {
ixgbe_ipsec_set_tx_sa(hw, idx, buf, 0);
ixgbe_ipsec_set_rx_sa(hw, idx, 0, buf, 0, 0, 0);
ixgbe_ipsec_set_rx_ip(hw, idx, (__be32 *)buf);
}
for (; idx < IXGBE_IPSEC_MAX_SA_COUNT; idx++) {
ixgbe_ipsec_set_tx_sa(hw, idx, buf, 0);
ixgbe_ipsec_set_rx_sa(hw, idx, 0, buf, 0, 0, 0);
}
}
/**
* ixgbe_init_ipsec_offload - initialize security registers for IPSec operation
* @adapter: board private structure
**/
void ixgbe_init_ipsec_offload(struct ixgbe_adapter *adapter)
{
ixgbe_ipsec_clear_hw_tables(adapter);
}

53
drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h Normal file
View File

@ -0,0 +1,53 @@
/*******************************************************************************
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_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
#endif /* _IXGBE_IPSEC_H_ */

1
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -10459,6 +10459,7 @@ skip_sriov:
NETIF_F_FCOE_MTU;
}
#endif /* IXGBE_FCOE */
ixgbe_init_ipsec_offload(adapter);
if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
netdev->hw_features |= NETIF_F_LRO;