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net/mlx5e: Add MACsec offload SecY support
Add offload support for MACsec SecY callbacks - add/update/delete. add_secy is called when need to create a new MACsec interface. upd_secy is called when source MAC address or tx SC was changed. del_secy is called when need to destroy the MACsec interface. Signed-off-by: Lior Nahmanson <liorna@nvidia.com> Reviewed-by: Raed Salem <raeds@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lior Nahmanson
David S. Miller
parent
b7c9400cbc
commit
5a39816a75
@ -66,6 +66,7 @@ struct mlx5e_macsec {
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/* Rx fs_id -> rx_sc mapping */
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struct xarray sc_xarray;
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unsigned char *dev_addr;
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struct mlx5_core_dev *mdev;
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};
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@ -243,6 +244,42 @@ static int mlx5e_macsec_update_rx_sa(struct mlx5e_macsec *macsec,
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return 0;
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}
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static bool mlx5e_macsec_secy_features_validate(struct macsec_context *ctx)
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{
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const struct net_device *netdev = ctx->netdev;
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const struct macsec_secy *secy = ctx->secy;
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if (secy->validate_frames != MACSEC_VALIDATE_STRICT) {
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netdev_err(netdev,
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"MACsec offload is supported only when validate_frame is in strict mode\n");
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return false;
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}
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if (secy->icv_len != MACSEC_DEFAULT_ICV_LEN) {
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netdev_err(netdev, "MACsec offload is supported only when icv_len is %d\n",
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MACSEC_DEFAULT_ICV_LEN);
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return false;
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}
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if (!secy->protect_frames) {
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netdev_err(netdev,
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"MACsec offload is supported only when protect_frames is set\n");
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return false;
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}
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if (secy->xpn) {
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netdev_err(netdev, "MACsec offload: xpn is not supported\n");
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return false;
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}
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if (secy->replay_protect) {
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netdev_err(netdev, "MACsec offload: replay protection is not supported\n");
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return false;
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}
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return true;
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}
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static int mlx5e_macsec_add_txsa(struct macsec_context *ctx)
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{
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const struct macsec_tx_sc *tx_sc = &ctx->secy->tx_sc;
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@ -764,6 +801,195 @@ out:
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return err;
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}
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static int mlx5e_macsec_add_secy(struct macsec_context *ctx)
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{
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struct mlx5e_priv *priv = netdev_priv(ctx->netdev);
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const struct net_device *dev = ctx->secy->netdev;
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const struct net_device *netdev = ctx->netdev;
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struct mlx5e_macsec *macsec;
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int err = 0;
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if (ctx->prepare)
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return 0;
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if (!mlx5e_macsec_secy_features_validate(ctx))
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return -EINVAL;
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mutex_lock(&priv->macsec->lock);
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macsec = priv->macsec;
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if (macsec->dev_addr) {
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netdev_err(netdev, "Currently, only one MACsec offload device can be set\n");
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err = -EINVAL;
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}
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macsec->dev_addr = kzalloc(dev->addr_len, GFP_KERNEL);
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if (!macsec->dev_addr) {
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err = -ENOMEM;
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goto out;
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}
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memcpy(macsec->dev_addr, dev->dev_addr, dev->addr_len);
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out:
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mutex_unlock(&macsec->lock);
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return err;
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}
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static int macsec_upd_secy_hw_address(struct macsec_context *ctx)
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{
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struct mlx5e_priv *priv = netdev_priv(ctx->netdev);
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const struct net_device *dev = ctx->secy->netdev;
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struct mlx5e_macsec *macsec = priv->macsec;
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struct mlx5e_macsec_rx_sc *rx_sc, *tmp;
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struct mlx5e_macsec_sa *rx_sa;
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struct list_head *list;
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int i, err = 0;
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list = &macsec->macsec_rx_sc_list_head;
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list_for_each_entry_safe(rx_sc, tmp, list, rx_sc_list_element) {
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for (i = 0; i < MACSEC_NUM_AN; ++i) {
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rx_sa = rx_sc->rx_sa[i];
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if (!rx_sa || !rx_sa->macsec_rule)
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continue;
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mlx5e_macsec_cleanup_sa(macsec, rx_sa, false);
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}
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}
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list_for_each_entry_safe(rx_sc, tmp, list, rx_sc_list_element) {
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for (i = 0; i < MACSEC_NUM_AN; ++i) {
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rx_sa = rx_sc->rx_sa[i];
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if (!rx_sa)
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continue;
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if (rx_sa->active) {
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err = mlx5e_macsec_init_sa(ctx, rx_sa, false, false);
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if (err)
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goto out;
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}
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}
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}
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memcpy(macsec->dev_addr, dev->dev_addr, dev->addr_len);
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out:
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return err;
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}
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/* this function is called from 2 macsec ops functions:
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* macsec_set_mac_address – MAC address was changed, therefore we need to destroy
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* and create new Tx contexts(macsec object + steering).
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* macsec_changelink – in this case the tx SC or SecY may be changed, therefore need to
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* destroy Tx and Rx contexts(macsec object + steering)
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*/
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static int mlx5e_macsec_upd_secy(struct macsec_context *ctx)
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{
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const struct macsec_tx_sc *tx_sc = &ctx->secy->tx_sc;
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struct mlx5e_priv *priv = netdev_priv(ctx->netdev);
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const struct net_device *dev = ctx->secy->netdev;
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struct mlx5e_macsec_sa *tx_sa;
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struct mlx5e_macsec *macsec;
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int i, err = 0;
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if (ctx->prepare)
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return 0;
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if (!mlx5e_macsec_secy_features_validate(ctx))
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return -EINVAL;
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mutex_lock(&priv->macsec->lock);
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macsec = priv->macsec;
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/* if the dev_addr hasn't change, it mean the callback is from macsec_changelink */
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if (!memcmp(macsec->dev_addr, dev->dev_addr, dev->addr_len)) {
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err = macsec_upd_secy_hw_address(ctx);
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if (err)
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goto out;
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}
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for (i = 0; i < MACSEC_NUM_AN; ++i) {
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tx_sa = macsec->tx_sa[i];
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if (!tx_sa)
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continue;
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mlx5e_macsec_cleanup_sa(macsec, tx_sa, true);
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}
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for (i = 0; i < MACSEC_NUM_AN; ++i) {
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tx_sa = macsec->tx_sa[i];
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if (!tx_sa)
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continue;
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if (tx_sa->assoc_num == tx_sc->encoding_sa && tx_sa->active) {
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err = mlx5e_macsec_init_sa(ctx, tx_sa, tx_sc->encrypt, true);
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if (err)
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goto out;
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}
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}
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out:
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mutex_unlock(&macsec->lock);
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return err;
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}
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static int mlx5e_macsec_del_secy(struct macsec_context *ctx)
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{
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struct mlx5e_priv *priv = netdev_priv(ctx->netdev);
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struct mlx5e_macsec_rx_sc *rx_sc, *tmp;
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struct mlx5e_macsec_sa *rx_sa;
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struct mlx5e_macsec_sa *tx_sa;
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struct mlx5e_macsec *macsec;
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struct list_head *list;
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int i;
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if (ctx->prepare)
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return 0;
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mutex_lock(&priv->macsec->lock);
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macsec = priv->macsec;
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for (i = 0; i < MACSEC_NUM_AN; ++i) {
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tx_sa = macsec->tx_sa[i];
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if (!tx_sa)
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continue;
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mlx5e_macsec_cleanup_sa(macsec, tx_sa, true);
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mlx5_destroy_encryption_key(macsec->mdev, tx_sa->enc_key_id);
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kfree(tx_sa);
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macsec->tx_sa[i] = NULL;
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}
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list = &macsec->macsec_rx_sc_list_head;
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list_for_each_entry_safe(rx_sc, tmp, list, rx_sc_list_element) {
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for (i = 0; i < MACSEC_NUM_AN; ++i) {
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rx_sa = rx_sc->rx_sa[i];
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if (!rx_sa)
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continue;
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mlx5e_macsec_cleanup_sa(macsec, rx_sa, false);
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mlx5_destroy_encryption_key(macsec->mdev, rx_sa->enc_key_id);
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kfree(rx_sa);
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rx_sc->rx_sa[i] = NULL;
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}
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list_del_rcu(&rx_sc->rx_sc_list_element);
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kfree_rcu(rx_sc);
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}
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kfree(macsec->dev_addr);
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macsec->dev_addr = NULL;
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mutex_unlock(&macsec->lock);
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return 0;
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}
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static bool mlx5e_is_macsec_device(const struct mlx5_core_dev *mdev)
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{
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if (!(MLX5_CAP_GEN_64(mdev, general_obj_types) &
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@ -805,6 +1031,9 @@ static const struct macsec_ops macsec_offload_ops = {
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.mdo_add_rxsa = mlx5e_macsec_add_rxsa,
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.mdo_upd_rxsa = mlx5e_macsec_upd_rxsa,
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.mdo_del_rxsa = mlx5e_macsec_del_rxsa,
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.mdo_add_secy = mlx5e_macsec_add_secy,
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.mdo_upd_secy = mlx5e_macsec_upd_secy,
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.mdo_del_secy = mlx5e_macsec_del_secy,
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};
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bool mlx5e_macsec_handle_tx_skb(struct mlx5e_macsec *macsec, struct sk_buff *skb)
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