ipsec: add Tx offload template into SA

[dpdk.git] / lib / librte_ipsec / sa.h

diff --git a/lib/librte_ipsec/sa.h b/lib/librte_ipsec/sa.h
index 4925219..48c3c10 100644 (file)
--- a/lib/librte_ipsec/sa.h
+++ b/lib/librte_ipsec/sa.h
@@ -5,6 +5,8 @@
 #ifndef _SA_H_
 #define _SA_H_
 
+#include <rte_rwlock.h>
+
 #define IPSEC_MAX_HDR_SIZE     64
 #define IPSEC_MAX_IV_SIZE      16
 #define IPSEC_MAX_IV_QWORD     (IPSEC_MAX_IV_SIZE / sizeof(uint64_t))
@@ -12,11 +14,23 @@
 /* padding alignment for different algorithms */
 enum {
        IPSEC_PAD_DEFAULT = 4,
+       IPSEC_PAD_3DES_CBC = 8,
        IPSEC_PAD_AES_CBC = IPSEC_MAX_IV_SIZE,
+       IPSEC_PAD_AES_CTR = IPSEC_PAD_DEFAULT,
        IPSEC_PAD_AES_GCM = IPSEC_PAD_DEFAULT,
        IPSEC_PAD_NULL = IPSEC_PAD_DEFAULT,
 };
 
+/* iv sizes for different algorithms */
+enum {
+       IPSEC_IV_SIZE_DEFAULT = IPSEC_MAX_IV_SIZE,
+       IPSEC_AES_CTR_IV_SIZE = sizeof(uint64_t),
+       /* TripleDES supports IV size of 32bits or 64bits but he library
+        * only supports 64bits.
+        */
+       IPSEC_3DES_IV_SIZE = sizeof(uint64_t),
+};
+
 /* these definitions probably has to be in rte_crypto_sym.h */
 union sym_op_ofslen {
        uint64_t raw;
@@ -36,12 +50,27 @@ union sym_op_data {
        };
 };
 
+#define REPLAY_SQN_NUM         2
+#define REPLAY_SQN_NEXT(n)     ((n) ^ 1)
+
 struct replay_sqn {
+       rte_rwlock_t rwl;
        uint64_t sqn;
        __extension__ uint64_t window[0];
 };
 
+/*IPSEC SA supported algorithms */
+enum sa_algo_type      {
+       ALGO_TYPE_NULL = 0,
+       ALGO_TYPE_3DES_CBC,
+       ALGO_TYPE_AES_CBC,
+       ALGO_TYPE_AES_CTR,
+       ALGO_TYPE_AES_GCM,
+       ALGO_TYPE_MAX
+};
+
 struct rte_ipsec_sa {
+
        uint64_t type;     /* type of given SA */
        uint64_t udata;    /* user defined */
        uint32_t size;     /* size of given sa object */
@@ -58,7 +87,13 @@ struct rte_ipsec_sa {
                union sym_op_ofslen cipher;
                union sym_op_ofslen auth;
        } ctp;
+       /* tx_offload template for tunnel mbuf */
+       struct {
+               uint64_t msk;
+               uint64_t val;
+       } tx_offload;
        uint32_t salt;
+       uint8_t algo_type;
        uint8_t proto;    /* next proto */
        uint8_t aad_len;
        uint8_t hdr_len;
@@ -74,12 +109,27 @@ struct rte_ipsec_sa {
 
        /*
         * sqn and replay window
+        * In case of SA handled by multiple threads *sqn* cacheline
+        * could be shared by multiple cores.
+        * To minimise perfomance impact, we try to locate in a separate
+        * place from other frequently accesed data.
         */
        union {
-               uint64_t outb;
-               struct replay_sqn *inb;
+               union {
+                       rte_atomic64_t atom;
+                       uint64_t raw;
+               } outb;
+               struct {
+                       uint32_t rdidx; /* read index */
+                       uint32_t wridx; /* write index */
+                       struct replay_sqn *rsn[REPLAY_SQN_NUM];
+               } inb;
        } sqn;
 
 } __rte_cache_aligned;
 
+int
+ipsec_sa_pkt_func_select(const struct rte_ipsec_session *ss,
+       const struct rte_ipsec_sa *sa, struct rte_ipsec_sa_pkt_func *pf);
+
 #endif /* _SA_H_ */