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nfp: tls: enable TLS RX offload 

Set ethtool TLS RX feature based on NIC capabilities, and enable
TLS RX when connections are added for decryption.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2019-06-10 21:40:07 -07:00 committed by David S. Miller
parent cad228a376
commit c0a4948e1d
3 changed files with 26 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/ethernet/netronome/nfp/crypto/crypto.h
View File

@ -7,6 +7,11 @@
struct nfp_net_tls_offload_ctx {
__be32 fw_handle[2];
u8 rx_end[0];
/* Tx only fields follow - Rx side does not have enough driver state
* to fit these
*/
u32 next_seq;
bool out_of_sync;
};

25
drivers/net/ethernet/netronome/nfp/crypto/tls.c
View File

@ -47,10 +47,16 @@ __nfp_net_tls_conn_cnt_changed(struct nfp_net *nn, int add,
u8 opcode;
int cnt;
opcode = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC;
nn->ktls_tx_conn_cnt += add;
cnt = nn->ktls_tx_conn_cnt;
nn->dp.ktls_tx = !!nn->ktls_tx_conn_cnt;
if (direction == TLS_OFFLOAD_CTX_DIR_TX) {
opcode = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC;
nn->ktls_tx_conn_cnt += add;
cnt = nn->ktls_tx_conn_cnt;
nn->dp.ktls_tx = !!nn->ktls_tx_conn_cnt;
} else {
opcode = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_DEC;
nn->ktls_rx_conn_cnt += add;
cnt = nn->ktls_rx_conn_cnt;
}
/* Care only about 0 -> 1 and 1 -> 0 transitions */
if (cnt > 1)
@ -228,7 +234,7 @@ nfp_net_cipher_supported(struct nfp_net *nn, u16 cipher_type,
if (direction == TLS_OFFLOAD_CTX_DIR_TX)
bit = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_ENC;
else
return false;
bit = NFP_NET_CRYPTO_OP_TLS_1_2_AES_GCM_128_DEC;
break;
default:
return false;
@ -256,6 +262,8 @@ nfp_net_tls_add(struct net_device *netdev, struct sock *sk,
BUILD_BUG_ON(sizeof(struct nfp_net_tls_offload_ctx) >
TLS_DRIVER_STATE_SIZE_TX);
BUILD_BUG_ON(offsetof(struct nfp_net_tls_offload_ctx, rx_end) >
TLS_DRIVER_STATE_SIZE_RX);
if (!nfp_net_cipher_supported(nn, crypto_info->cipher_type, direction))
return -EOPNOTSUPP;
@ -341,7 +349,8 @@ nfp_net_tls_add(struct net_device *netdev, struct sock *sk,
ntls = tls_driver_ctx(sk, direction);
memcpy(ntls->fw_handle, reply->handle, sizeof(ntls->fw_handle));
ntls->next_seq = start_offload_tcp_sn;
if (direction == TLS_OFFLOAD_CTX_DIR_TX)
ntls->next_seq = start_offload_tcp_sn;
dev_consume_skb_any(skb);
if (direction == TLS_OFFLOAD_CTX_DIR_TX)
@ -450,6 +459,10 @@ int nfp_net_tls_init(struct nfp_net *nn)
if (err)
return err;
if (nn->tlv_caps.crypto_ops & NFP_NET_TLS_OPCODE_MASK_RX) {
netdev->hw_features |= NETIF_F_HW_TLS_RX;
netdev->features |= NETIF_F_HW_TLS_RX;
}
if (nn->tlv_caps.crypto_ops & NFP_NET_TLS_OPCODE_MASK_TX) {
netdev->hw_features |= NETIF_F_HW_TLS_TX;
netdev->features |= NETIF_F_HW_TLS_TX;

2
drivers/net/ethernet/netronome/nfp/nfp_net.h
View File

@ -582,6 +582,7 @@ struct nfp_net_dp {
* @rx_bar: Pointer to mapped FL/RX queues
* @tlv_caps: Parsed TLV capabilities
* @ktls_tx_conn_cnt: Number of offloaded kTLS TX connections
* @ktls_rx_conn_cnt: Number of offloaded kTLS RX connections
* @ktls_no_space: Counter of firmware rejecting kTLS connection due to
* lack of space
* @mbox_cmsg: Common Control Message via vNIC mailbox state
@ -667,6 +668,7 @@ struct nfp_net {
struct nfp_net_tlv_caps tlv_caps;
unsigned int ktls_tx_conn_cnt;
unsigned int ktls_rx_conn_cnt;
atomic_t ktls_no_space;