diff mbox series

[net-next,4/8] mlxsw: spectrum_acl_bloom_filter: Make mlxsw_sp_acl_bf_key_encode() more flexible

Message ID 20220106160652.821176-5-idosch@nvidia.com (mailing list archive)
State Accepted
Commit 5d5c3ba9e4121b7738d10be3825f4d9a5a1d80ef
Delegated to: Netdev Maintainers
Headers show
Series mlxsw: Add Spectrum-4 support | expand

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netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 51 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Ido Schimmel Jan. 6, 2022, 4:06 p.m. UTC 
From: Amit Cohen <amcohen@nvidia.com>

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>
---
 .../mlxsw/spectrum_acl_bloom_filter.c         | 36 +++++++++++++------
 1 file changed, 25 insertions(+), 11 deletions(-)
diff mbox series

Patch

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 732c261f83cf..f0cd14a791df 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_acl_bloom_filter.c
@@ -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,
-			   struct mlxsw_sp_acl_atcam_entry *aentry,
-			   char *output, u8 *len)
+__mlxsw_sp_acl_bf_key_encode(struct mlxsw_sp_acl_atcam_region *aregion,
+			     struct mlxsw_sp_acl_atcam_entry *aentry,
+			     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