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Rahul Lakkireddy says: ==================== cxgb4: add TC-MATCHALL classifier offload This series of patches add support to offload TC-MATCHALL classifier to hardware to classify all outgoing and incoming traffic on the underlying port. Only 1 egress and 1 ingress rule each can be offloaded on the underlying port. Patch 1 adds support for TC-MATCHALL classifier offload on the egress side. TC-POLICE is the only action that can be offloaded on the egress side and is used to rate limit all outgoing traffic to specified max rate. Patch 2 adds logic to reject the current rule offload if its priority conflicts with existing rules in the TCAM. Patch 3 adds support for TC-MATCHALL classifier offload on the ingress side. The same set of actions supported by existing TC-FLOWER classifier offload can be applied on all the incoming traffic. v5: - Fixed commit message and comment to include comparison for equal priority in patch 2. v4: - Removed check in patch 1 to reject police offload if prio is not 1. - Moved TC_SETUP_BLOCK code to separate function in patch 1. - Added logic to ensure the prio passed by TC doesn't conflict with other rules in TCAM in patch 2. - Higher index has lower priority than lower index in TCAM. So, rework cxgb4_get_free_ftid() to search free index from end of TCAM in descending order in patch 2. - Added check to ensure the matchall rule's prio doesn't conflict with other rules in TCAM in patch 3. - Added logic to fill default mask for VIID, if none has been provided, to prevent conflict with duplicate VIID rules in patch 3. - Used existing variables in private structure to fill VIID info, instead of extracting the info manually in patch 3. v3: - Added check in patch 1 to reject police offload if prio is not 1. - Assign block_shared variable only for TC_SETUP_BLOCK in patch 1. v2: - Added check to reject flow block sharing for policers in patch 1. - Removed logic to fetch free index from end of TCAM in patch 2. Must maintain the same ordering as in kernel. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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