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mlxsw: spectrum_acl_bloom_filter: Make mlxsw_sp_acl_bf_key_encode() more flexible

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Spectrum-4 will calculate hash function for bloom filter differently from
the existing ASICs.

One of the changes is related to the way that the chunks will be build -
without padding.

As preparation for support of Spectrum-4 bloom filter, make
mlxsw_sp_acl_bf_key_encode() more flexible, so it will be able to use it
for Spectrum-4 as well.

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 18:06:48 +02:00 committed by Jakub Kicinski
parent 4711671297
commit 5d5c3ba9e4
1 changed files with 25 additions and 11 deletions
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34
drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c
View file

@ -116,9 +116,10 @@ static u16 mlxsw_sp_acl_bf_crc(const u8 *buffer, size_t len)
}
static void
mlxsw_sp_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion,
__mlxsw_sp_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion,
struct mlxsw_sp_acl_atcam_entry *aentry,
char *output, u8 *len)
char *output, u8 *len, u8 max_chunks, u8 pad_bytes,
u8 key_offset, u8 chunk_key_len, u8 chunk_len)
{
struct mlxsw_afk_key_info *key_info = aregion->region->key_info;
u8 chunk_index, chunk_count, block_count;
@ -129,17 +130,30 @@ mlxsw_sp_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion,
chunk_count = 1 + ((block_count - 1) >> 2);
erp_region_id = cpu_to_be16(aentry->ht_key.erp_id |
(aregion->region->id << 4));
for (chunk_index = MLXSW_BLOOM_KEY_CHUNKS - chunk_count;
chunk_index < MLXSW_BLOOM_KEY_CHUNKS; chunk_index++) {
memset(chunk, 0, MLXSW_BLOOM_CHUNK_PAD_BYTES);
memcpy(chunk + MLXSW_BLOOM_CHUNK_PAD_BYTES, &erp_region_id,
for (chunk_index = max_chunks - chunk_count; chunk_index < max_chunks;
chunk_index++) {
memset(chunk, 0, pad_bytes);
memcpy(chunk + pad_bytes, &erp_region_id,
sizeof(erp_region_id));
memcpy(chunk + MLXSW_BLOOM_CHUNK_KEY_OFFSET,
memcpy(chunk + key_offset,
&aentry->enc_key[chunk_key_offsets[chunk_index]],
MLXSW_BLOOM_CHUNK_KEY_BYTES);
chunk += MLXSW_BLOOM_KEY_CHUNK_BYTES;
chunk_key_len);
chunk += chunk_len;
}
*len = chunk_count * MLXSW_BLOOM_KEY_CHUNK_BYTES;
*len = chunk_count * chunk_len;
}
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_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);
}
static unsigned int