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net/mlx5e: IPSec, Add Innova IPSec offload RX data path

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In RX data path, the hardware prepends a special metadata ethertype
which indicates that the packet underwent decryption, and the result of
the authentication check.

Communicate this to the stack in skb->sp.

Make wqe_size large enough to account for the injected metadata.

Support only Linked-list RQ type.

IPSec offload RX packets may have useful CHECKSUM_COMPLETE information,
which the stack may not be able to use yet.

Signed-off-by: Ilan Tayari <ilant@mellanox.com>
Signed-off-by: Yossi Kuperman <yossiku@mellanox.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Signed-off-by: Boris Pismenny <borisp@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Ilan Tayari 2017-06-19 14:04:36 +03:00 committed by Saeed Mahameed
parent 547eede070
commit 899a59d301
7 changed files with 269 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/mellanox/mlx5/core/Makefile
View File

@ -20,4 +20,4 @@ mlx5_core-$(CONFIG_MLX5_CORE_EN_DCB) += en_dcbnl.o
mlx5_core-$(CONFIG_MLX5_CORE_IPOIB) += ipoib/ipoib.o ipoib/ethtool.o
mlx5_core-$(CONFIG_MLX5_EN_IPSEC) += en_accel/ipsec.o
mlx5_core-$(CONFIG_MLX5_EN_IPSEC) += en_accel/ipsec.o en_accel/ipsec_rxtx.o

19
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
View File

@ -40,6 +40,7 @@
#include "en.h"
#include "accel/ipsec.h"
#include "en_accel/ipsec.h"
#include "en_accel/ipsec_rxtx.h"
struct mlx5e_ipsec_sa_entry {
struct hlist_node hlist; /* Item in SADB_RX hashtable */
@ -49,6 +50,24 @@ struct mlx5e_ipsec_sa_entry {
void *context;
};
struct xfrm_state *mlx5e_ipsec_sadb_rx_lookup(struct mlx5e_ipsec *ipsec,
unsigned int handle)
{
struct mlx5e_ipsec_sa_entry *sa_entry;
struct xfrm_state *ret = NULL;
rcu_read_lock();
hash_for_each_possible_rcu(ipsec->sadb_rx, sa_entry, hlist, handle)
if (sa_entry->handle == handle) {
ret = sa_entry->x;
xfrm_state_hold(ret);
break;
}
rcu_read_unlock();
return ret;
}
static int mlx5e_ipsec_sadb_rx_add(struct mlx5e_ipsec_sa_entry *sa_entry)
{
struct mlx5e_ipsec *ipsec = sa_entry->ipsec;

9
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
View File

@ -41,14 +41,23 @@
#include <linux/idr.h>
#define MLX5E_IPSEC_SADB_RX_BITS 10
#define MLX5E_METADATA_ETHER_TYPE (0x8CE4)
#define MLX5E_METADATA_ETHER_LEN 8
struct mlx5e_priv;
struct mlx5e_ipsec_sw_stats {
atomic64_t ipsec_rx_drop_sp_alloc;
atomic64_t ipsec_rx_drop_sadb_miss;
atomic64_t ipsec_rx_drop_syndrome;
};
struct mlx5e_ipsec {
struct mlx5e_priv *en_priv;
DECLARE_HASHTABLE(sadb_rx, MLX5E_IPSEC_SADB_RX_BITS);
spinlock_t sadb_rx_lock; /* Protects sadb_rx and halloc */
struct ida halloc;
struct mlx5e_ipsec_sw_stats sw_stats;
};
int mlx5e_ipsec_init(struct mlx5e_priv *priv);

135
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c Normal file
View File

@ -0,0 +1,135 @@
/*
* Copyright (c) 2017 Mellanox Technologies. 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.
*
*/
#include <crypto/aead.h>
#include <net/xfrm.h>
#include "en_accel/ipsec_rxtx.h"
#include "en_accel/ipsec.h"
#include "en.h"
enum {
MLX5E_IPSEC_RX_SYNDROME_DECRYPTED = 0x11,
MLX5E_IPSEC_RX_SYNDROME_AUTH_FAILED = 0x12,
};
struct mlx5e_ipsec_rx_metadata {
unsigned char reserved;
__be32 sa_handle;
} __packed;
struct mlx5e_ipsec_metadata {
unsigned char syndrome;
union {
unsigned char raw[5];
/* from FPGA to host, on successful decrypt */
struct mlx5e_ipsec_rx_metadata rx;
} __packed content;
/* packet type ID field */
__be16 ethertype;
} __packed;
static inline struct xfrm_state *
mlx5e_ipsec_build_sp(struct net_device *netdev, struct sk_buff *skb,
struct mlx5e_ipsec_metadata *mdata)
{
struct mlx5e_priv *priv = netdev_priv(netdev);
struct xfrm_offload *xo;
struct xfrm_state *xs;
u32 sa_handle;
skb->sp = secpath_dup(skb->sp);
if (unlikely(!skb->sp)) {
atomic64_inc(&priv->ipsec->sw_stats.ipsec_rx_drop_sp_alloc);
return NULL;
}
sa_handle = be32_to_cpu(mdata->content.rx.sa_handle);
xs = mlx5e_ipsec_sadb_rx_lookup(priv->ipsec, sa_handle);
if (unlikely(!xs)) {
atomic64_inc(&priv->ipsec->sw_stats.ipsec_rx_drop_sadb_miss);
return NULL;
}
skb->sp->xvec[skb->sp->len++] = xs;
skb->sp->olen++;
xo = xfrm_offload(skb);
xo->flags = CRYPTO_DONE;
switch (mdata->syndrome) {
case MLX5E_IPSEC_RX_SYNDROME_DECRYPTED:
xo->status = CRYPTO_SUCCESS;
break;
case MLX5E_IPSEC_RX_SYNDROME_AUTH_FAILED:
xo->status = CRYPTO_TUNNEL_ESP_AUTH_FAILED;
break;
default:
atomic64_inc(&priv->ipsec->sw_stats.ipsec_rx_drop_syndrome);
return NULL;
}
return xs;
}
struct sk_buff *mlx5e_ipsec_handle_rx_skb(struct net_device *netdev,
struct sk_buff *skb)
{
struct mlx5e_ipsec_metadata *mdata;
struct ethhdr *old_eth;
struct ethhdr *new_eth;
struct xfrm_state *xs;
__be16 *ethtype;
/* Detect inline metadata */
if (skb->len < ETH_HLEN + MLX5E_METADATA_ETHER_LEN)
return skb;
ethtype = (__be16 *)(skb->data + ETH_ALEN * 2);
if (*ethtype != cpu_to_be16(MLX5E_METADATA_ETHER_TYPE))
return skb;
/* Use the metadata */
mdata = (struct mlx5e_ipsec_metadata *)(skb->data + ETH_HLEN);
xs = mlx5e_ipsec_build_sp(netdev, skb, mdata);
if (unlikely(!xs)) {
kfree_skb(skb);
return NULL;
}
/* Remove the metadata from the buffer */
old_eth = (struct ethhdr *)skb->data;
new_eth = (struct ethhdr *)(skb->data + MLX5E_METADATA_ETHER_LEN);
memmove(new_eth, old_eth, 2 * ETH_ALEN);
/* Ethertype is already in its new place */
skb_pull_inline(skb, MLX5E_METADATA_ETHER_LEN);
return skb;
}

44
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.h Normal file
View File

@ -0,0 +1,44 @@
/*
* Copyright (c) 2017 Mellanox Technologies. 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.
*
*/
#ifndef __MLX5E_IPSEC_RXTX_H__
#define __MLX5E_IPSEC_RXTX_H__
#include <linux/skbuff.h>
#include "en.h"
struct sk_buff *mlx5e_ipsec_handle_rx_skb(struct net_device *netdev,
struct sk_buff *skb);
void mlx5e_ipsec_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe);
#endif /* __MLX5E_IPSEC_RXTX_H__ */

20
drivers/net/ethernet/mellanox/mlx5/core/en_main.c
View File

@ -40,6 +40,8 @@
#include "en_tc.h"
#include "en_rep.h"
#include "en_accel/ipsec.h"
#include "en_accel/ipsec_rxtx.h"
#include "accel/ipsec.h"
#include "vxlan.h"
struct mlx5e_rq_param {
@ -116,7 +118,7 @@ void mlx5e_set_rq_type_params(struct mlx5_core_dev *mdev,
static void mlx5e_set_rq_params(struct mlx5_core_dev *mdev, struct mlx5e_params *params)
{
u8 rq_type = mlx5e_check_fragmented_striding_rq_cap(mdev) &&
!params->xdp_prog ?
!params->xdp_prog && !MLX5_IPSEC_DEV(mdev) ?
MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ :
MLX5_WQ_TYPE_LINKED_LIST;
mlx5e_set_rq_type_params(mdev, params, rq_type);
@ -593,6 +595,13 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
rq->dealloc_wqe = mlx5e_dealloc_rx_mpwqe;
rq->handle_rx_cqe = c->priv->profile->rx_handlers.handle_rx_cqe_mpwqe;
#ifdef CONFIG_MLX5_EN_IPSEC
if (MLX5_IPSEC_DEV(mdev)) {
err = -EINVAL;
netdev_err(c->netdev, "MPWQE RQ with IPSec offload not supported\n");
goto err_rq_wq_destroy;
}
#endif
if (!rq->handle_rx_cqe) {
err = -EINVAL;
netdev_err(c->netdev, "RX handler of MPWQE RQ is not set, err %d\n", err);
@ -625,6 +634,11 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
rq->alloc_wqe = mlx5e_alloc_rx_wqe;
rq->dealloc_wqe = mlx5e_dealloc_rx_wqe;
#ifdef CONFIG_MLX5_EN_IPSEC
if (c->priv->ipsec)
rq->handle_rx_cqe = mlx5e_ipsec_handle_rx_cqe;
else
#endif
rq->handle_rx_cqe = c->priv->profile->rx_handlers.handle_rx_cqe;
if (!rq->handle_rx_cqe) {
kfree(rq->wqe.frag_info);
@ -636,6 +650,10 @@ static int mlx5e_alloc_rq(struct mlx5e_channel *c,
rq->buff.wqe_sz = params->lro_en ?
params->lro_wqe_sz :
MLX5E_SW2HW_MTU(c->priv, c->netdev->mtu);
#ifdef CONFIG_MLX5_EN_IPSEC
if (MLX5_IPSEC_DEV(mdev))
rq->buff.wqe_sz += MLX5E_METADATA_ETHER_LEN;
#endif
rq->wqe.page_reuse = !params->xdp_prog && !params->lro_en;
byte_count = rq->buff.wqe_sz;

41
drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
View File

@ -41,6 +41,7 @@
#include "eswitch.h"
#include "en_rep.h"
#include "ipoib/ipoib.h"
#include "en_accel/ipsec_rxtx.h"
static inline bool mlx5e_rx_hw_stamp(struct mlx5e_tstamp *tstamp)
{
@ -1183,3 +1184,43 @@ wq_free_wqe:
}
#endif /* CONFIG_MLX5_CORE_IPOIB */
#ifdef CONFIG_MLX5_EN_IPSEC
void mlx5e_ipsec_handle_rx_cqe(struct mlx5e_rq *rq, struct mlx5_cqe64 *cqe)
{
struct mlx5e_wqe_frag_info *wi;
struct mlx5e_rx_wqe *wqe;
__be16 wqe_counter_be;
struct sk_buff *skb;
u16 wqe_counter;
u32 cqe_bcnt;
wqe_counter_be = cqe->wqe_counter;
wqe_counter = be16_to_cpu(wqe_counter_be);
wqe = mlx5_wq_ll_get_wqe(&rq->wq, wqe_counter);
wi = &rq->wqe.frag_info[wqe_counter];
cqe_bcnt = be32_to_cpu(cqe->byte_cnt);
skb = skb_from_cqe(rq, cqe, wi, cqe_bcnt);
if (unlikely(!skb)) {
/* a DROP, save the page-reuse checks */
mlx5e_free_rx_wqe(rq, wi);
goto wq_ll_pop;
}
skb = mlx5e_ipsec_handle_rx_skb(rq->netdev, skb);
if (unlikely(!skb)) {
mlx5e_free_rx_wqe(rq, wi);
goto wq_ll_pop;
}
mlx5e_complete_rx_cqe(rq, cqe, cqe_bcnt, skb);
napi_gro_receive(rq->cq.napi, skb);
mlx5e_free_rx_wqe_reuse(rq, wi);
wq_ll_pop:
mlx5_wq_ll_pop(&rq->wq, wqe_counter_be,
&wqe->next.next_wqe_index);
}
#endif /* CONFIG_MLX5_EN_IPSEC */