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Date: Mon, 10 Apr 2023 09:19:07 +0300
From: Leon Romanovsky <leon@...nel.org>
To: "David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: Leon Romanovsky <leonro@...dia.com>,
Steffen Klassert <steffen.klassert@...unet.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>,
Raed Salem <raeds@...dia.com>, Emeel Hakim <ehakim@...dia.com>
Subject: [PATCH net-next 05/10] net/mlx5e: Support IPsec RX packet offload in tunnel mode
From: Leon Romanovsky <leonro@...dia.com>
Extend mlx5 driver with logic to support IPsec RX packet offload
in tunnel mode.
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
.../mellanox/mlx5/core/en_accel/ipsec.c | 36 ++++++++++++
.../mellanox/mlx5/core/en_accel/ipsec.h | 2 +
.../mellanox/mlx5/core/en_accel/ipsec_fs.c | 57 +++++++++++++++++++
3 files changed, 95 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
index 359da277c03a..7c55b37c1c01 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
@@ -242,6 +242,41 @@ static void mlx5e_ipsec_init_limits(struct mlx5e_ipsec_sa_entry *sa_entry,
attrs->lft.numb_rounds_soft = (u64)n;
}
+static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
+ struct mlx5_accel_esp_xfrm_attrs *attrs)
+{
+ struct mlx5_core_dev *mdev = mlx5e_ipsec_sa2dev(sa_entry);
+ struct xfrm_state *x = sa_entry->x;
+ struct net_device *netdev;
+ struct neighbour *n;
+ u8 addr[ETH_ALEN];
+
+ if (attrs->mode != XFRM_MODE_TUNNEL &&
+ attrs->type != XFRM_DEV_OFFLOAD_PACKET)
+ return;
+
+ netdev = x->xso.real_dev;
+
+ mlx5_query_mac_address(mdev, addr);
+ switch (attrs->dir) {
+ case XFRM_DEV_OFFLOAD_IN:
+ ether_addr_copy(attrs->dmac, addr);
+ n = neigh_lookup(&arp_tbl, &attrs->saddr.a4, netdev);
+ if (!n) {
+ n = neigh_create(&arp_tbl, &attrs->saddr.a4, netdev);
+ if (IS_ERR(n))
+ return;
+ neigh_event_send(n, NULL);
+ }
+ neigh_ha_snapshot(addr, n, netdev);
+ ether_addr_copy(attrs->smac, addr);
+ break;
+ default:
+ return;
+ }
+ neigh_release(n);
+}
+
void mlx5e_ipsec_build_accel_xfrm_attrs(struct mlx5e_ipsec_sa_entry *sa_entry,
struct mlx5_accel_esp_xfrm_attrs *attrs)
{
@@ -300,6 +335,7 @@ void mlx5e_ipsec_build_accel_xfrm_attrs(struct mlx5e_ipsec_sa_entry *sa_entry,
attrs->mode = x->props.mode;
mlx5e_ipsec_init_limits(sa_entry, attrs);
+ mlx5e_ipsec_init_macs(sa_entry, attrs);
}
static int mlx5e_xfrm_validate_state(struct mlx5_core_dev *mdev,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
index ae525420a492..77384ffa4451 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.h
@@ -99,6 +99,8 @@ struct mlx5_accel_esp_xfrm_attrs {
u32 authsize;
u32 reqid;
struct mlx5_ipsec_lft lft;
+ u8 smac[ETH_ALEN];
+ u8 dmac[ETH_ALEN];
};
enum mlx5_ipsec_cap {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
index 980583fb1e52..8ecaf4100b9c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
@@ -836,6 +836,60 @@ static int setup_modify_header(struct mlx5_core_dev *mdev, u32 val, u8 dir,
return 0;
}
+static int
+setup_pkt_tunnel_reformat(struct mlx5_core_dev *mdev,
+ struct mlx5_accel_esp_xfrm_attrs *attrs,
+ struct mlx5_pkt_reformat_params *reformat_params)
+{
+ union {
+ struct {
+ u8 dmac[6];
+ u8 smac[6];
+ __be16 ethertype;
+ } __packed;
+ u8 raw[ETH_HLEN];
+ } __packed *mac_hdr;
+ char *reformatbf;
+ size_t bfflen;
+
+ bfflen = sizeof(*mac_hdr);
+
+ reformatbf = kzalloc(bfflen, GFP_KERNEL);
+ if (!reformatbf)
+ return -ENOMEM;
+
+ mac_hdr = (void *)reformatbf;
+ switch (attrs->family) {
+ case AF_INET:
+ mac_hdr->ethertype = htons(ETH_P_IP);
+ break;
+ case AF_INET6:
+ mac_hdr->ethertype = htons(ETH_P_IPV6);
+ break;
+ default:
+ goto free_reformatbf;
+ }
+
+ ether_addr_copy(mac_hdr->dmac, attrs->dmac);
+ ether_addr_copy(mac_hdr->smac, attrs->smac);
+
+ switch (attrs->dir) {
+ case XFRM_DEV_OFFLOAD_IN:
+ reformat_params->type = MLX5_REFORMAT_TYPE_L3_ESP_TUNNEL_TO_L2;
+ break;
+ default:
+ goto free_reformatbf;
+ }
+
+ reformat_params->size = bfflen;
+ reformat_params->data = reformatbf;
+ return 0;
+
+free_reformatbf:
+ kfree(reformatbf);
+ return -EINVAL;
+}
+
static int
setup_pkt_transport_reformat(struct mlx5_accel_esp_xfrm_attrs *attrs,
struct mlx5_pkt_reformat_params *reformat_params)
@@ -898,6 +952,9 @@ static int setup_pkt_reformat(struct mlx5_core_dev *mdev,
case XFRM_MODE_TRANSPORT:
ret = setup_pkt_transport_reformat(attrs, &reformat_params);
break;
+ case XFRM_MODE_TUNNEL:
+ ret = setup_pkt_tunnel_reformat(mdev, attrs, &reformat_params);
+ break;
default:
ret = -EINVAL;
}
--
2.39.2
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