netdev - [net-next 04/10] ixgbe: add ipsec data structures

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Date:   Tue, 23 Jan 2018 10:21:02 -0800
From:   Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:     davem@...emloft.net
Cc:     Shannon Nelson <shannon.nelson@...cle.com>, netdev@...r.kernel.org,
        nhorman@...hat.com, sassmann@...hat.com, jogreene@...hat.com,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 04/10] ixgbe: add ipsec data structures

From: Shannon Nelson <shannon.nelson@...cle.com>

Set up the data structures to be used by the ipsec offload.

Signed-off-by: Shannon Nelson <shannon.nelson@...cle.com>
Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe.h       |  5 ++++
 drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h | 40 ++++++++++++++++++++++++++
 2 files changed, 45 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
index 08018b1cad03..c4254a189183 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
@@ -630,6 +630,7 @@ struct ixgbe_adapter {
 #define IXGBE_FLAG2_EEE_CAPABLE			BIT(14)
 #define IXGBE_FLAG2_EEE_ENABLED			BIT(15)
 #define IXGBE_FLAG2_RX_LEGACY			BIT(16)
+#define IXGBE_FLAG2_IPSEC_ENABLED		BIT(17)
 
 	/* Tx fast path data */
 	int num_tx_queues;
@@ -782,6 +783,10 @@ struct ixgbe_adapter {
 
 #define IXGBE_RSS_KEY_SIZE     40  /* size of RSS Hash Key in bytes */
 	u32 *rss_key;
+
+#ifdef CONFIG_XFRM
+	struct ixgbe_ipsec *ipsec;
+#endif /* CONFIG_XFRM */
 };
 
 static inline u8 ixgbe_max_rss_indices(struct ixgbe_adapter *adapter)
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h
index 8fe8289d3eee..da3ce7849e85 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.h
@@ -50,4 +50,44 @@ enum ixgbe_ipsec_tbl_sel {
 #define IXGBE_RXMOD_DECRYPT		0x00000008
 #define IXGBE_RXMOD_IPV6		0x00000010
 
+struct rx_sa {
+	struct hlist_node hlist;
+	struct xfrm_state *xs;
+	__be32 ipaddr[4];
+	u32 key[4];
+	u32 salt;
+	u32 mode;
+	u8  iptbl_ind;
+	bool used;
+	bool decrypt;
+};
+
+struct rx_ip_sa {
+	__be32 ipaddr[4];
+	u32 ref_cnt;
+	bool used;
+};
+
+struct tx_sa {
+	struct xfrm_state *xs;
+	u32 key[4];
+	u32 salt;
+	bool encrypt;
+	bool used;
+};
+
+struct ixgbe_ipsec_tx_data {
+	u32 flags;
+	u16 trailer_len;
+	u16 sa_idx;
+};
+
+struct ixgbe_ipsec {
+	u16 num_rx_sa;
+	u16 num_tx_sa;
+	struct rx_ip_sa *ip_tbl;
+	struct rx_sa *rx_tbl;
+	struct tx_sa *tx_tbl;
+	DECLARE_HASHTABLE(rx_sa_list, 10);
+};
 #endif /* _IXGBE_IPSEC_H_ */
-- 
2.14.3