#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
-#include <vnet/ip/ip46_address.h>
-#include <vnet/udp/udp_packet.h>
#include <vnet/hash/hash.h>
#include <vppinfra/crc32.h>
#ifdef clib_crc32c_uses_intrinsics
-typedef union
-{
- struct
- {
- ip46_address_t src_address;
- ip46_address_t dst_address;
- union
- {
- struct
- {
- u16 src_port;
- u16 dst_port;
- };
- u32 l4_hdr;
- };
- };
- u8 as_u8[36];
-} crc32c_5tuple_key_t;
-
static const u8 l4_mask_bits[256] = {
[IP_PROTOCOL_ICMP] = 16, [IP_PROTOCOL_IGMP] = 8,
[IP_PROTOCOL_TCP] = 32, [IP_PROTOCOL_UDP] = 32,
[IP_PROTOCOL_ICMP6] = 16,
};
-static_always_inline void
-compute_ip6_key (ip6_header_t *ip, crc32c_5tuple_key_t *k)
+static_always_inline u32
+compute_ip6_key (ip6_header_t *ip)
{
+ u32 hash = 0, l4hdr;
u8 pr;
-
- /* copy 32 bytes of ip6 src and dst addresses into hash_key_t */
- clib_memcpy_fast ((u8 *) k, (u8 *) ip + 8, sizeof (ip6_address_t) * 2);
+ /* dst + src ip as u64 */
+ hash = clib_crc32c_u64 (hash, *(u64u *) ((u8 *) ip + 8));
+ hash = clib_crc32c_u64 (hash, *(u64u *) ((u8 *) ip + 16));
+ hash = clib_crc32c_u64 (hash, *(u64u *) ((u8 *) ip + 24));
+ hash = clib_crc32c_u64 (hash, *(u64u *) ((u8 *) ip + 32));
pr = ip->protocol;
- /* write l4 header */
- k->l4_hdr = *(u32 *) ip6_next_header (ip) & pow2_mask (l4_mask_bits[pr]);
+ l4hdr = *(u32 *) ip6_next_header (ip) & pow2_mask (l4_mask_bits[pr]);
+ /* protocol + l4 hdr */
+ return clib_crc32c_u64 (hash, ((u64) pr << 32) | l4hdr);
}
-static_always_inline void
-compute_ip4_key (ip4_header_t *ip, crc32c_5tuple_key_t *k)
+static_always_inline u32
+compute_ip4_key (ip4_header_t *ip)
{
+ u32 hash = 0, l4hdr;
u8 pr;
- u64 *key = (u64 *) k;
- /* copy 8 bytes of ip src and dst addresses into hash_key_t */
- key[0] = 0;
- key[1] = 0;
- key[2] = 0;
- key[3] = *(u64 *) ((u8 *) ip + 12);
+ /* dst + src ip as u64 */
+ hash = clib_crc32c_u64 (0, *(u64 *) ((u8 *) ip + 12));
pr = ip->protocol;
- /* write l4 header */
- k->l4_hdr = *(u32 *) ip4_next_header (ip) & pow2_mask (l4_mask_bits[pr]);
+ l4hdr = *(u32 *) ip4_next_header (ip) & pow2_mask (l4_mask_bits[pr]);
+ /* protocol + l4 hdr */
+ return clib_crc32c_u64 (hash, ((u64) pr << 32) | l4hdr);
}
-static_always_inline void
-compute_ip_key (void *p, crc32c_5tuple_key_t *key)
+static_always_inline u32
+compute_ip_key (void *p)
{
if ((((u8 *) p)[0] & 0xf0) == 0x40)
- compute_ip4_key (p, key);
+ return compute_ip4_key (p);
else if ((((u8 *) p)[0] & 0xf0) == 0x60)
- compute_ip6_key (p, key);
+ return compute_ip6_key (p);
+ return 0;
}
void
while (n_left_from >= 8)
{
- crc32c_5tuple_key_t key[4] = {};
-
clib_prefetch_load (p[4]);
clib_prefetch_load (p[5]);
clib_prefetch_load (p[6]);
clib_prefetch_load (p[7]);
- compute_ip_key (p[0], &key[0]);
- compute_ip_key (p[1], &key[1]);
- compute_ip_key (p[2], &key[2]);
- compute_ip_key (p[3], &key[3]);
-
- hash[0] = clib_crc32c (key[0].as_u8, sizeof (key[0]));
- hash[1] = clib_crc32c (key[1].as_u8, sizeof (key[1]));
- hash[2] = clib_crc32c (key[2].as_u8, sizeof (key[2]));
- hash[3] = clib_crc32c (key[3].as_u8, sizeof (key[3]));
+ hash[0] = compute_ip_key (p[0]);
+ hash[1] = compute_ip_key (p[1]);
+ hash[2] = compute_ip_key (p[2]);
+ hash[3] = compute_ip_key (p[3]);
hash += 4;
n_left_from -= 4;
while (n_left_from > 0)
{
- crc32c_5tuple_key_t key = {};
-
- compute_ip_key (p[0], &key);
-
- hash[0] = clib_crc32c (key.as_u8, sizeof (key));
+ hash[0] = compute_ip_key (p[0]);
hash += 1;
n_left_from -= 1;
}
}
-static_always_inline void
-compute_ethernet_key (void *p, crc32c_5tuple_key_t *key)
+static_always_inline u32
+compute_ethernet_key (void *p)
{
u16 ethertype = 0, l2hdr_sz = 0;
if (ethertype == ETHERNET_TYPE_IP4)
{
ip4_header_t *ip4 = (ip4_header_t *) (p + l2hdr_sz);
- compute_ip4_key (ip4, key);
+ return compute_ip4_key (ip4);
}
else if (ethertype == ETHERNET_TYPE_IP6)
{
ip6_header_t *ip6 = (ip6_header_t *) (p + l2hdr_sz);
- compute_ip6_key (ip6, key);
+ return compute_ip6_key (ip6);
}
+ return 0;
}
void
while (n_left_from >= 8)
{
- crc32c_5tuple_key_t key[4] = {};
-
clib_prefetch_load (p[4]);
clib_prefetch_load (p[5]);
clib_prefetch_load (p[6]);
clib_prefetch_load (p[7]);
- compute_ethernet_key (p[0], &key[0]);
- compute_ethernet_key (p[1], &key[1]);
- compute_ethernet_key (p[2], &key[2]);
- compute_ethernet_key (p[3], &key[3]);
-
- hash[0] = clib_crc32c (key[0].as_u8, sizeof (key[0]));
- hash[1] = clib_crc32c (key[1].as_u8, sizeof (key[1]));
- hash[2] = clib_crc32c (key[2].as_u8, sizeof (key[2]));
- hash[3] = clib_crc32c (key[3].as_u8, sizeof (key[3]));
+ hash[0] = compute_ethernet_key (p[0]);
+ hash[1] = compute_ethernet_key (p[1]);
+ hash[2] = compute_ethernet_key (p[2]);
+ hash[3] = compute_ethernet_key (p[3]);
hash += 4;
n_left_from -= 4;
while (n_left_from > 0)
{
- crc32c_5tuple_key_t key = {};
-
- compute_ethernet_key (p[0], &key);
-
- hash[0] = clib_crc32c (key.as_u8, sizeof (key));
+ hash[0] = compute_ethernet_key (p[0]);
hash += 1;
n_left_from -= 1;
#if __SSE4_2__
#define clib_crc32c_uses_intrinsics
#include <x86intrin.h>
-
-#define crc32_u64 _mm_crc32_u64
-#define crc32_u32 _mm_crc32_u32
-
static_always_inline u32
-clib_crc32c (u8 * s, int len)
+clib_crc32c_u8 (u32 last, u8 data)
{
- u32 v = 0;
-
-#if defined(__x86_64__)
- for (; len >= 8; len -= 8, s += 8)
- v = _mm_crc32_u64 (v, *((u64 *) s));
-#else
- /* workaround weird GCC bug when using _mm_crc32_u32
- which happens with -O2 optimization */
-#if !defined (__i686__)
- asm volatile ("":::"memory");
-#endif
-#endif
-
- for (; len >= 4; len -= 4, s += 4)
- v = _mm_crc32_u32 (v, *((u32 *) s));
+ return _mm_crc32_u8 (last, data);
+}
- for (; len >= 2; len -= 2, s += 2)
- v = _mm_crc32_u16 (v, *((u16 *) s));
+static_always_inline u32
+clib_crc32c_u16 (u32 last, u16 data)
+{
+ return _mm_crc32_u16 (last, data);
+}
- for (; len >= 1; len -= 1, s += 1)
- v = _mm_crc32_u8 (v, *((u16 *) s));
+static_always_inline u32
+clib_crc32c_u32 (u32 last, u32 data)
+{
+ return _mm_crc32_u32 (last, data);
+}
- return v;
+static_always_inline u32
+clib_crc32c_u64 (u32 last, u64 data)
+{
+ return _mm_crc32_u64 (last, data);
}
+#endif
-#elif __ARM_FEATURE_CRC32
+#if __ARM_FEATURE_CRC32
#define clib_crc32c_uses_intrinsics
#include <arm_acle.h>
+static_always_inline u32
+clib_crc32c_u8 (u32 last, u8 data)
+{
+ return __crc32cd (last, data);
+}
+static_always_inline u32
+clib_crc32c_u16 (u32 last, u16 data)
+{
+ return __crc32ch (last, data);
+}
-#define crc32_u64 __crc32cd
-#define crc32_u32 __crc32cw
+static_always_inline u32
+clib_crc32c_u32 (u32 last, u32 data)
+{
+ return __crc32cw (last, data);
+}
+static_always_inline u32
+clib_crc32c_u64 (u32 last, u64 data)
+{
+ return __crc32cd (last, data);
+}
+#endif
+
+#ifdef clib_crc32c_uses_intrinsics
static_always_inline u32
clib_crc32c (u8 * s, int len)
{
u32 v = 0;
for (; len >= 8; len -= 8, s += 8)
- v = __crc32cd (v, *((u64 *) s));
+ v = clib_crc32c_u64 (v, *((u64u *) s));
for (; len >= 4; len -= 4, s += 4)
- v = __crc32cw (v, *((u32 *) s));
+ v = clib_crc32c_u32 (v, *((u32u *) s));
for (; len >= 2; len -= 2, s += 2)
- v = __crc32ch (v, *((u16 *) s));
+ v = clib_crc32c_u16 (v, *((u16u *) s));
for (; len >= 1; len -= 1, s += 1)
- v = __crc32cb (v, *((u8 *) s));
+ v = clib_crc32c_u8 (v, *((u8 *) s));
return v;
}
-
#endif
+
#endif /* __included_crc32_h__ */
/*