X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_fib%2Fdir24_8.h;h=bac65eeda9a507ba83679e5d955513b44ca49baa;hb=2b9a66e1b606d3813d72dd81c626949e09706e27;hp=1ec437c0cbd0c11d3dda549147de1b8e47726c68;hpb=06710448c98efbc8986866f7bde6f6df1f5316c1;p=dpdk.git diff --git a/lib/librte_fib/dir24_8.h b/lib/librte_fib/dir24_8.h index 1ec437c0cb..bac65eeda9 100644 --- a/lib/librte_fib/dir24_8.h +++ b/lib/librte_fib/dir24_8.h @@ -6,6 +6,9 @@ #ifndef _DIR24_8_H_ #define _DIR24_8_H_ +#include +#include + /** * @file * DIR24_8 algorithm @@ -15,6 +18,227 @@ extern "C" { #endif +#define DIR24_8_TBL24_NUM_ENT (1 << 24) +#define DIR24_8_TBL8_GRP_NUM_ENT 256U +#define DIR24_8_EXT_ENT 1 +#define DIR24_8_TBL24_MASK 0xffffff00 + +#define BITMAP_SLAB_BIT_SIZE_LOG2 6 +#define BITMAP_SLAB_BIT_SIZE (1 << BITMAP_SLAB_BIT_SIZE_LOG2) +#define BITMAP_SLAB_BITMASK (BITMAP_SLAB_BIT_SIZE - 1) + +struct dir24_8_tbl { + uint32_t number_tbl8s; /**< Total number of tbl8s */ + uint32_t rsvd_tbl8s; /**< Number of reserved tbl8s */ + uint32_t cur_tbl8s; /**< Current number of tbl8s */ + enum rte_fib_dir24_8_nh_sz nh_sz; /**< Size of nexthop entry */ + uint64_t def_nh; /**< Default next hop */ + uint64_t *tbl8; /**< tbl8 table. */ + uint64_t *tbl8_idxes; /**< bitmap containing free tbl8 idxes*/ + /* tbl24 table. */ + __extension__ uint64_t tbl24[0] __rte_cache_aligned; +}; + +static inline void * +get_tbl24_p(struct dir24_8_tbl *dp, uint32_t ip, uint8_t nh_sz) +{ + return (void *)&((uint8_t *)dp->tbl24)[(ip & + DIR24_8_TBL24_MASK) >> (8 - nh_sz)]; +} + +static inline uint8_t +bits_in_nh(uint8_t nh_sz) +{ + return 8 * (1 << nh_sz); +} + +static inline uint64_t +get_max_nh(uint8_t nh_sz) +{ + return ((1ULL << (bits_in_nh(nh_sz) - 1)) - 1); +} + +static inline uint32_t +get_tbl24_idx(uint32_t ip) +{ + return ip >> 8; +} + +static inline uint32_t +get_tbl8_idx(uint32_t res, uint32_t ip) +{ + return (res >> 1) * DIR24_8_TBL8_GRP_NUM_ENT + (uint8_t)ip; +} + +static inline uint64_t +lookup_msk(uint8_t nh_sz) +{ + return ((1ULL << ((1 << (nh_sz + 3)) - 1)) << 1) - 1; +} + +static inline uint8_t +get_psd_idx(uint32_t val, uint8_t nh_sz) +{ + return val & ((1 << (3 - nh_sz)) - 1); +} + +static inline uint32_t +get_tbl_idx(uint32_t val, uint8_t nh_sz) +{ + return val >> (3 - nh_sz); +} + +static inline uint64_t +get_tbl24(struct dir24_8_tbl *dp, uint32_t ip, uint8_t nh_sz) +{ + return ((dp->tbl24[get_tbl_idx(get_tbl24_idx(ip), nh_sz)] >> + (get_psd_idx(get_tbl24_idx(ip), nh_sz) * + bits_in_nh(nh_sz))) & lookup_msk(nh_sz)); +} + +static inline uint64_t +get_tbl8(struct dir24_8_tbl *dp, uint32_t res, uint32_t ip, uint8_t nh_sz) +{ + return ((dp->tbl8[get_tbl_idx(get_tbl8_idx(res, ip), nh_sz)] >> + (get_psd_idx(get_tbl8_idx(res, ip), nh_sz) * + bits_in_nh(nh_sz))) & lookup_msk(nh_sz)); +} + +static inline int +is_entry_extended(uint64_t ent) +{ + return (ent & DIR24_8_EXT_ENT) == DIR24_8_EXT_ENT; +} + +#define LOOKUP_FUNC(suffix, type, bulk_prefetch, nh_sz) \ +static inline void dir24_8_lookup_bulk_##suffix(void *p, const uint32_t *ips, \ + uint64_t *next_hops, const unsigned int n) \ +{ \ + struct dir24_8_tbl *dp = (struct dir24_8_tbl *)p; \ + uint64_t tmp; \ + uint32_t i; \ + uint32_t prefetch_offset = \ + RTE_MIN((unsigned int)bulk_prefetch, n); \ + \ + for (i = 0; i < prefetch_offset; i++) \ + rte_prefetch0(get_tbl24_p(dp, ips[i], nh_sz)); \ + for (i = 0; i < (n - prefetch_offset); i++) { \ + rte_prefetch0(get_tbl24_p(dp, \ + ips[i + prefetch_offset], nh_sz)); \ + tmp = ((type *)dp->tbl24)[ips[i] >> 8]; \ + if (unlikely(is_entry_extended(tmp))) \ + tmp = ((type *)dp->tbl8)[(uint8_t)ips[i] + \ + ((tmp >> 1) * DIR24_8_TBL8_GRP_NUM_ENT)]; \ + next_hops[i] = tmp >> 1; \ + } \ + for (; i < n; i++) { \ + tmp = ((type *)dp->tbl24)[ips[i] >> 8]; \ + if (unlikely(is_entry_extended(tmp))) \ + tmp = ((type *)dp->tbl8)[(uint8_t)ips[i] + \ + ((tmp >> 1) * DIR24_8_TBL8_GRP_NUM_ENT)]; \ + next_hops[i] = tmp >> 1; \ + } \ +} \ + +LOOKUP_FUNC(1b, uint8_t, 5, 0) +LOOKUP_FUNC(2b, uint16_t, 6, 1) +LOOKUP_FUNC(4b, uint32_t, 15, 2) +LOOKUP_FUNC(8b, uint64_t, 12, 3) + +static inline void +dir24_8_lookup_bulk(struct dir24_8_tbl *dp, const uint32_t *ips, + uint64_t *next_hops, const unsigned int n, uint8_t nh_sz) +{ + uint64_t tmp; + uint32_t i; + uint32_t prefetch_offset = RTE_MIN(15U, n); + + for (i = 0; i < prefetch_offset; i++) + rte_prefetch0(get_tbl24_p(dp, ips[i], nh_sz)); + for (i = 0; i < (n - prefetch_offset); i++) { + rte_prefetch0(get_tbl24_p(dp, ips[i + prefetch_offset], + nh_sz)); + tmp = get_tbl24(dp, ips[i], nh_sz); + if (unlikely(is_entry_extended(tmp))) + tmp = get_tbl8(dp, tmp, ips[i], nh_sz); + + next_hops[i] = tmp >> 1; + } + for (; i < n; i++) { + tmp = get_tbl24(dp, ips[i], nh_sz); + if (unlikely(is_entry_extended(tmp))) + tmp = get_tbl8(dp, tmp, ips[i], nh_sz); + + next_hops[i] = tmp >> 1; + } +} + +static inline void +dir24_8_lookup_bulk_0(void *p, const uint32_t *ips, + uint64_t *next_hops, const unsigned int n) +{ + struct dir24_8_tbl *dp = (struct dir24_8_tbl *)p; + + dir24_8_lookup_bulk(dp, ips, next_hops, n, 0); +} + +static inline void +dir24_8_lookup_bulk_1(void *p, const uint32_t *ips, + uint64_t *next_hops, const unsigned int n) +{ + struct dir24_8_tbl *dp = (struct dir24_8_tbl *)p; + + dir24_8_lookup_bulk(dp, ips, next_hops, n, 1); +} + +static inline void +dir24_8_lookup_bulk_2(void *p, const uint32_t *ips, + uint64_t *next_hops, const unsigned int n) +{ + struct dir24_8_tbl *dp = (struct dir24_8_tbl *)p; + + dir24_8_lookup_bulk(dp, ips, next_hops, n, 2); +} + +static inline void +dir24_8_lookup_bulk_3(void *p, const uint32_t *ips, + uint64_t *next_hops, const unsigned int n) +{ + struct dir24_8_tbl *dp = (struct dir24_8_tbl *)p; + + dir24_8_lookup_bulk(dp, ips, next_hops, n, 3); +} + +static inline void +dir24_8_lookup_bulk_uni(void *p, const uint32_t *ips, + uint64_t *next_hops, const unsigned int n) +{ + struct dir24_8_tbl *dp = (struct dir24_8_tbl *)p; + uint64_t tmp; + uint32_t i; + uint32_t prefetch_offset = RTE_MIN(15U, n); + uint8_t nh_sz = dp->nh_sz; + + for (i = 0; i < prefetch_offset; i++) + rte_prefetch0(get_tbl24_p(dp, ips[i], nh_sz)); + for (i = 0; i < (n - prefetch_offset); i++) { + rte_prefetch0(get_tbl24_p(dp, ips[i + prefetch_offset], + nh_sz)); + tmp = get_tbl24(dp, ips[i], nh_sz); + if (unlikely(is_entry_extended(tmp))) + tmp = get_tbl8(dp, tmp, ips[i], nh_sz); + + next_hops[i] = tmp >> 1; + } + for (; i < n; i++) { + tmp = get_tbl24(dp, ips[i], nh_sz); + if (unlikely(is_entry_extended(tmp))) + tmp = get_tbl8(dp, tmp, ips[i], nh_sz); + + next_hops[i] = tmp >> 1; + } +} + void * dir24_8_create(const char *name, int socket_id, struct rte_fib_conf *conf); @@ -22,7 +246,7 @@ void dir24_8_free(void *p); rte_fib_lookup_fn_t -dir24_8_get_lookup_fn(struct rte_fib_conf *conf); +dir24_8_get_lookup_fn(void *p, enum rte_fib_lookup_type type); int dir24_8_modify(struct rte_fib *fib, uint32_t ip, uint8_t depth,