From 29409f363e2dfdab41bb2f3019116a0a585e8d0b Mon Sep 17 00:00:00 2001 From: Amit Cohen Date: Thu, 6 Jan 2022 18:06:49 +0200 Subject: [PATCH] mlxsw: spectrum_acl_bloom_filter: Rename Spectrum-2 specific objects for future use Spectrum-4 will calculate hash function for bloom filter differently from the existing ASICs. There are two changes: 1. Instead of using one hash function to calculate 16 bits output (CRC-16), two functions will be used. 2. The chunks will be built differently, without padding. As preparation for support of Spectrum-4 bloom filter, rename CRC table to include "sp2" prefix and "crc16", as next patch will add two additional tables. In addition, rename all the dedicated functions and defines for Spectrum-{2,3} to include "sp2" prefix. Signed-off-by: Amit Cohen Reviewed-by: Petr Machata Signed-off-by: Ido Schimmel Signed-off-by: Jakub Kicinski --- .../mellanox/mlxsw/spectrum_acl_bloom_filter.c | 50 +++++++++++----------- 1 file changed, 25 insertions(+), 25 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c index f0cd14a..3a3c768 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c @@ -27,7 +27,7 @@ struct mlxsw_sp_acl_bf { * +-------------------------+------------------------+------------------------+ */ #define MLXSW_BLOOM_KEY_CHUNKS 3 -#define MLXSW_BLOOM_KEY_LEN 69 +#define MLXSW_SP2_BLOOM_KEY_LEN 69 /* Each chunk size is 23 bytes. 18 bytes of it contain 4 key blocks, each is * 36 bits, 2 bytes which hold eRP ID and region ID, and 3 bytes of zero @@ -42,14 +42,14 @@ struct mlxsw_sp_acl_bf { * | 0 | region ID | eRP ID | 4 Key blocks (18 Bytes) | * +---------+-----------+----------+-----------------------------------+ */ -#define MLXSW_BLOOM_CHUNK_PAD_BYTES 3 -#define MLXSW_BLOOM_CHUNK_KEY_BYTES 18 -#define MLXSW_BLOOM_KEY_CHUNK_BYTES 23 +#define MLXSW_SP2_BLOOM_CHUNK_PAD_BYTES 3 +#define MLXSW_SP2_BLOOM_CHUNK_KEY_BYTES 18 +#define MLXSW_SP2_BLOOM_KEY_CHUNK_BYTES 23 /* The offset of the key block within a chunk is 5 bytes as it comes after * 3 bytes of zero padding and 16 bits of region ID and eRP ID. */ -#define MLXSW_BLOOM_CHUNK_KEY_OFFSET 5 +#define MLXSW_SP2_BLOOM_CHUNK_KEY_OFFSET 5 /* Each chunk contains 4 key blocks. Chunk 2 uses key blocks 11-8, * and we need to populate it with 4 key blocks copied from the entry encoded @@ -66,7 +66,7 @@ static const u8 chunk_key_offsets[MLXSW_BLOOM_KEY_CHUNKS] = {2, 20, 38}; * which is 0x8529 (1 + x^3 + x^5 + x^8 + x^10 + x^15 and * the implicit x^16). */ -static const u16 mlxsw_sp_acl_bf_crc_tab[256] = { +static const u16 mlxsw_sp2_acl_bf_crc16_tab[256] = { 0x0000, 0x8529, 0x8f7b, 0x0a52, 0x9bdf, 0x1ef6, 0x14a4, 0x918d, 0xb297, 0x37be, 0x3dec, 0xb8c5, 0x2948, 0xac61, 0xa633, 0x231a, 0xe007, 0x652e, 0x6f7c, 0xea55, 0x7bd8, 0xfef1, 0xf4a3, 0x718a, @@ -101,17 +101,17 @@ static const u16 mlxsw_sp_acl_bf_crc_tab[256] = { 0x0c4c, 0x8965, 0x8337, 0x061e, 0x9793, 0x12ba, 0x18e8, 0x9dc1, }; -static u16 mlxsw_sp_acl_bf_crc_byte(u16 crc, u8 c) +static u16 mlxsw_sp2_acl_bf_crc16_byte(u16 crc, u8 c) { - return (crc << 8) ^ mlxsw_sp_acl_bf_crc_tab[(crc >> 8) ^ c]; + return (crc << 8) ^ mlxsw_sp2_acl_bf_crc16_tab[(crc >> 8) ^ c]; } -static u16 mlxsw_sp_acl_bf_crc(const u8 *buffer, size_t len) +static u16 mlxsw_sp2_acl_bf_crc(const u8 *buffer, size_t len) { u16 crc = 0; while (len--) - crc = mlxsw_sp_acl_bf_crc_byte(crc, *buffer++); + crc = mlxsw_sp2_acl_bf_crc16_byte(crc, *buffer++); return crc; } @@ -144,28 +144,28 @@ __mlxsw_sp_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion, } static void -mlxsw_sp_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion, - struct mlxsw_sp_acl_atcam_entry *aentry, - char *output, u8 *len) +mlxsw_sp2_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion, + struct mlxsw_sp_acl_atcam_entry *aentry, + char *output, u8 *len) { __mlxsw_sp_acl_bf_key_encode(aregion, aentry, output, len, MLXSW_BLOOM_KEY_CHUNKS, - MLXSW_BLOOM_CHUNK_PAD_BYTES, - MLXSW_BLOOM_CHUNK_KEY_OFFSET, - MLXSW_BLOOM_CHUNK_KEY_BYTES, - MLXSW_BLOOM_KEY_CHUNK_BYTES); + MLXSW_SP2_BLOOM_CHUNK_PAD_BYTES, + MLXSW_SP2_BLOOM_CHUNK_KEY_OFFSET, + MLXSW_SP2_BLOOM_CHUNK_KEY_BYTES, + MLXSW_SP2_BLOOM_KEY_CHUNK_BYTES); } static unsigned int -mlxsw_sp_acl_bf_index_get(struct mlxsw_sp_acl_bf *bf, - struct mlxsw_sp_acl_atcam_region *aregion, - struct mlxsw_sp_acl_atcam_entry *aentry) +mlxsw_sp2_acl_bf_index_get(struct mlxsw_sp_acl_bf *bf, + struct mlxsw_sp_acl_atcam_region *aregion, + struct mlxsw_sp_acl_atcam_entry *aentry) { - char bf_key[MLXSW_BLOOM_KEY_LEN]; + char bf_key[MLXSW_SP2_BLOOM_KEY_LEN]; u8 bf_size; - mlxsw_sp_acl_bf_key_encode(aregion, aentry, bf_key, &bf_size); - return mlxsw_sp_acl_bf_crc(bf_key, bf_size); + mlxsw_sp2_acl_bf_key_encode(aregion, aentry, bf_key, &bf_size); + return mlxsw_sp2_acl_bf_crc(bf_key, bf_size); } static unsigned int @@ -190,7 +190,7 @@ mlxsw_sp_acl_bf_entry_add(struct mlxsw_sp *mlxsw_sp, mutex_lock(&bf->lock); - bf_index = mlxsw_sp_acl_bf_index_get(bf, aregion, aentry); + bf_index = mlxsw_sp2_acl_bf_index_get(bf, aregion, aentry); rule_index = mlxsw_sp_acl_bf_rule_count_index_get(bf, erp_bank, bf_index); @@ -233,7 +233,7 @@ mlxsw_sp_acl_bf_entry_del(struct mlxsw_sp *mlxsw_sp, mutex_lock(&bf->lock); - bf_index = mlxsw_sp_acl_bf_index_get(bf, aregion, aentry); + bf_index = mlxsw_sp2_acl_bf_index_get(bf, aregion, aentry); rule_index = mlxsw_sp_acl_bf_rule_count_index_get(bf, erp_bank, bf_index); -- 2.7.4