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net/mlx5e: Support IPsec TX packet offload in tunnel mode

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Extend mlx5 driver with logic to support IPsec TX packet offload
in tunnel mode.

Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Leon Romanovsky
2023-04-13 15:29:24 +03:00
committed by Jakub Kicinski
parent 37a417ca91
commit efbd31c4d8
2 changed files with 64 additions and 0 deletions
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12
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec.c
View File

@@ -271,6 +271,18 @@ static void mlx5e_ipsec_init_macs(struct mlx5e_ipsec_sa_entry *sa_entry,
neigh_ha_snapshot(addr, n, netdev);
ether_addr_copy(attrs->smac, addr);
break;
case XFRM_DEV_OFFLOAD_OUT:
ether_addr_copy(attrs->smac, addr);
n = neigh_lookup(&arp_tbl, &attrs->daddr.a4, netdev);
if (!n) {
n = neigh_create(&arp_tbl, &attrs->daddr.a4, netdev);
if (IS_ERR(n))
return;
neigh_event_send(n, NULL);
}
neigh_ha_snapshot(addr, n, netdev);
ether_addr_copy(attrs->dmac, addr);
break;
default:
return;
}

52
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_fs.c
View File

@@ -11,6 +11,7 @@
#define NUM_IPSEC_FTE BIT(15)
#define MLX5_REFORMAT_TYPE_ADD_ESP_TRANSPORT_SIZE 16
#define IPSEC_TUNNEL_DEFAULT_TTL 0x40
struct mlx5e_ipsec_fc {
struct mlx5_fc *cnt;
@@ -842,12 +843,31 @@ setup_pkt_tunnel_reformat(struct mlx5_core_dev *mdev,
struct mlx5_accel_esp_xfrm_attrs *attrs,
struct mlx5_pkt_reformat_params *reformat_params)
{
struct ip_esp_hdr *esp_hdr;
struct ipv6hdr *ipv6hdr;
struct ethhdr *eth_hdr;
struct iphdr *iphdr;
char *reformatbf;
size_t bfflen;
void *hdr;
bfflen = sizeof(*eth_hdr);
if (attrs->dir == XFRM_DEV_OFFLOAD_OUT) {
bfflen += sizeof(*esp_hdr) + 8;
switch (attrs->family) {
case AF_INET:
bfflen += sizeof(*iphdr);
break;
case AF_INET6:
bfflen += sizeof(*ipv6hdr);
break;
default:
return -EINVAL;
}
}
reformatbf = kzalloc(bfflen, GFP_KERNEL);
if (!reformatbf)
return -ENOMEM;
@@ -871,6 +891,38 @@ setup_pkt_tunnel_reformat(struct mlx5_core_dev *mdev,
case XFRM_DEV_OFFLOAD_IN:
reformat_params->type = MLX5_REFORMAT_TYPE_L3_ESP_TUNNEL_TO_L2;
break;
case XFRM_DEV_OFFLOAD_OUT:
reformat_params->type = MLX5_REFORMAT_TYPE_L2_TO_L3_ESP_TUNNEL;
reformat_params->param_0 = attrs->authsize;
hdr = reformatbf + sizeof(*eth_hdr);
switch (attrs->family) {
case AF_INET:
iphdr = (struct iphdr *)hdr;
memcpy(&iphdr->saddr, &attrs->saddr.a4, 4);
memcpy(&iphdr->daddr, &attrs->daddr.a4, 4);
iphdr->version = 4;
iphdr->ihl = 5;
iphdr->ttl = IPSEC_TUNNEL_DEFAULT_TTL;
iphdr->protocol = IPPROTO_ESP;
hdr += sizeof(*iphdr);
break;
case AF_INET6:
ipv6hdr = (struct ipv6hdr *)hdr;
memcpy(&ipv6hdr->saddr, &attrs->saddr.a6, 16);
memcpy(&ipv6hdr->daddr, &attrs->daddr.a6, 16);
ipv6hdr->nexthdr = IPPROTO_ESP;
ipv6hdr->version = 6;
ipv6hdr->hop_limit = IPSEC_TUNNEL_DEFAULT_TTL;
hdr += sizeof(*ipv6hdr);
break;
default:
goto free_reformatbf;
}
esp_hdr = (struct ip_esp_hdr *)hdr;
esp_hdr->spi = htonl(attrs->spi);
break;
default:
goto free_reformatbf;
}