net: atlantic: macsec: make the prepare phase a noop

In preparation for removing the MACsec h/w offloading preparation phase,
make it a no-op in the Atlantic driver.
Signed-off-by: NAntoine Tenart <atenart@kernel.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/aquantia/atlantic/aq_macsec.c

@@ -452,6 +452,9 @@ static int aq_mdo_add_secy(struct macsec_context *ctx)
 	u32 txsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	if (secy->xpn)
 		return -EOPNOTSUPP;
 
@@ -466,9 +469,6 @@ static int aq_mdo_add_secy(struct macsec_context *ctx)
 	if (txsc_idx == AQ_MACSEC_MAX_SC)
 		return -ENOSPC;
 
-	if (ctx->prepare)
-		return 0;
-
 	cfg->sc_sa = sc_sa;
 	cfg->aq_txsc[txsc_idx].hw_sc_idx = aq_to_hw_sc_idx(txsc_idx, sc_sa);
 	cfg->aq_txsc[txsc_idx].sw_secy = secy;
@@ -488,13 +488,13 @@ static int aq_mdo_upd_secy(struct macsec_context *ctx)
 	int txsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, secy);
 	if (txsc_idx < 0)
 		return -ENOENT;
 
-	if (ctx->prepare)
-		return 0;
-
 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
 		ret = aq_set_txsc(nic, txsc_idx);
 
@@ -597,13 +597,13 @@ static int aq_mdo_add_txsa(struct macsec_context *ctx)
 	int txsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, secy);
 	if (txsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_txsc = &cfg->aq_txsc[txsc_idx];
 	set_bit(ctx->sa.assoc_num, &aq_txsc->tx_sa_idx_busy);
 
@@ -627,13 +627,13 @@ static int aq_mdo_upd_txsa(struct macsec_context *ctx)
 	int txsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, secy);
 	if (txsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_txsc = &cfg->aq_txsc[txsc_idx];
 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
 		ret = aq_update_txsa(nic, aq_txsc->hw_sc_idx, secy,
@@ -677,13 +677,13 @@ static int aq_mdo_del_txsa(struct macsec_context *ctx)
 	int txsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, ctx->secy);
 	if (txsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	ret = aq_clear_txsa(nic, &cfg->aq_txsc[txsc_idx], ctx->sa.assoc_num,
 			    AQ_CLEAR_ALL);
 
@@ -773,6 +773,9 @@ static int aq_mdo_add_rxsc(struct macsec_context *ctx)
 	u32 rxsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	if (hweight32(cfg->rxsc_idx_busy) >= rxsc_idx_max)
 		return -ENOSPC;
 
@@ -780,9 +783,6 @@ static int aq_mdo_add_rxsc(struct macsec_context *ctx)
 	if (rxsc_idx >= rxsc_idx_max)
 		return -ENOSPC;
 
-	if (ctx->prepare)
-		return 0;
-
 	cfg->aq_rxsc[rxsc_idx].hw_sc_idx = aq_to_hw_sc_idx(rxsc_idx,
 							   cfg->sc_sa);
 	cfg->aq_rxsc[rxsc_idx].sw_secy = ctx->secy;
@@ -805,13 +805,13 @@ static int aq_mdo_upd_rxsc(struct macsec_context *ctx)
 	int rxsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, ctx->rx_sc);
 	if (rxsc_idx < 0)
 		return -ENOENT;
 
-	if (ctx->prepare)
-		return 0;
-
 	if (netif_carrier_ok(nic->ndev) && netif_running(ctx->secy->netdev))
 		ret = aq_set_rxsc(nic, rxsc_idx);
 
@@ -872,13 +872,13 @@ static int aq_mdo_del_rxsc(struct macsec_context *ctx)
 	int rxsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, ctx->rx_sc);
 	if (rxsc_idx < 0)
 		return -ENOENT;
 
-	if (ctx->prepare)
-		return 0;
-
 	if (netif_carrier_ok(nic->ndev))
 		clear_type = AQ_CLEAR_ALL;
 
@@ -944,13 +944,13 @@ static int aq_mdo_add_rxsa(struct macsec_context *ctx)
 	int rxsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, rx_sc);
 	if (rxsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_rxsc = &nic->macsec_cfg->aq_rxsc[rxsc_idx];
 	set_bit(ctx->sa.assoc_num, &aq_rxsc->rx_sa_idx_busy);
 
@@ -974,13 +974,13 @@ static int aq_mdo_upd_rxsa(struct macsec_context *ctx)
 	int rxsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, rx_sc);
 	if (rxsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
 		ret = aq_update_rxsa(nic, cfg->aq_rxsc[rxsc_idx].hw_sc_idx,
 				     secy, ctx->sa.rx_sa, NULL,
@@ -1025,13 +1025,13 @@ static int aq_mdo_del_rxsa(struct macsec_context *ctx)
 	int rxsc_idx;
 	int ret = 0;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, rx_sc);
 	if (rxsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	ret = aq_clear_rxsa(nic, &cfg->aq_rxsc[rxsc_idx], ctx->sa.assoc_num,
 			    AQ_CLEAR_ALL);
 
@@ -1069,13 +1069,13 @@ static int aq_mdo_get_tx_sc_stats(struct macsec_context *ctx)
 	struct aq_macsec_txsc *aq_txsc;
 	int txsc_idx;
 
+	if (ctx->prepare)
+		return 0;
+
 	txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, ctx->secy);
 	if (txsc_idx < 0)
 		return -ENOENT;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_txsc = &nic->macsec_cfg->aq_txsc[txsc_idx];
 	stats = &aq_txsc->stats;
 	aq_get_txsc_stats(hw, aq_txsc->hw_sc_idx, stats);
@@ -1102,13 +1102,13 @@ static int aq_mdo_get_tx_sa_stats(struct macsec_context *ctx)
 	u32 next_pn;
 	int ret;
 
+	if (ctx->prepare)
+		return 0;
+
 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, ctx->secy);
 	if (txsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_txsc = &cfg->aq_txsc[txsc_idx];
 	sa_idx = aq_txsc->hw_sc_idx | ctx->sa.assoc_num;
 	stats = &aq_txsc->tx_sa_stats[ctx->sa.assoc_num];
@@ -1143,13 +1143,13 @@ static int aq_mdo_get_rx_sc_stats(struct macsec_context *ctx)
 	int ret = 0;
 	int i;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, ctx->rx_sc);
 	if (rxsc_idx < 0)
 		return -ENOENT;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_rxsc = &cfg->aq_rxsc[rxsc_idx];
 	for (i = 0; i < MACSEC_NUM_AN; i++) {
 		if (!test_bit(i, &aq_rxsc->rx_sa_idx_busy))
@@ -1192,13 +1192,13 @@ static int aq_mdo_get_rx_sa_stats(struct macsec_context *ctx)
 	u32 next_pn;
 	int ret;
 
+	if (ctx->prepare)
+		return 0;
+
 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, ctx->rx_sc);
 	if (rxsc_idx < 0)
 		return -EINVAL;
 
-	if (ctx->prepare)
-		return 0;
-
 	aq_rxsc = &cfg->aq_rxsc[rxsc_idx];
 	stats = &aq_rxsc->rx_sa_stats[ctx->sa.assoc_num];
 	sa_idx = aq_rxsc->hw_sc_idx | ctx->sa.assoc_num;