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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 <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Amit Cohen 2022-01-06 18:06:49 +02:00 committed by Jakub Kicinski
parent 5d5c3ba9e4
commit 29409f363e
1 changed files with 25 additions and 25 deletions
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50
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c
View File

@ -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);