Patch "mlxsw: spectrum_acl_bloom_filter: Make mlxsw_sp_acl_bf_key_encode() more flexible" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    mlxsw: spectrum_acl_bloom_filter: Make mlxsw_sp_acl_bf_key_encode() more flexible

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mlxsw-spectrum_acl_bloom_filter-make-mlxsw_sp_acl_bf.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit f53e2fd00b52975ae5e0b787e73c93fe856da3f7
Author: Amit Cohen <amcohen@xxxxxxxxxx>
Date:   Thu Jan 6 18:06:48 2022 +0200

    mlxsw: spectrum_acl_bloom_filter: Make mlxsw_sp_acl_bf_key_encode() more flexible
    
    [ Upstream commit 5d5c3ba9e4121b7738d10be3825f4d9a5a1d80ef ]
    
    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@xxxxxxxxxx>
    Reviewed-by: Petr Machata <petrm@xxxxxxxxxx>
    Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxx>
    Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
    Stable-dep-of: 75d8d7a63065 ("mlxsw: spectrum_acl: Fix ACL scale regression and firmware errors")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

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 2e8b17e3b9358..2d2e29c202770 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




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