dpdkMetadata.h

/*
Copyright 2022 Intel Corp.
 
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
 
    http://www.apache.org/licenses/LICENSE-2.0
 
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
 
#ifndef BACKENDS_DPDK_DPDKMETADATA_H_
#define BACKENDS_DPDK_DPDKMETADATA_H_
 
#include "dpdkUtils.h"
#include "frontends/common/resolveReferences/referenceMap.h"
#include "ir/ir.h"
 
namespace P4::DPDK {
 
class IsDirectionMetadataUsed : public Inspector {
    bool &is_direction_used;
 
 public:
    explicit IsDirectionMetadataUsed(bool &is_direction_used)
        : is_direction_used(is_direction_used) {}
    bool preorder(const IR::Member *m) override {
        if (!is_direction_used && isDirection(m)) {
            is_direction_used = true;
        }
        return false;
    }
};

class DirectionToRegRead : public Transform {
    ordered_map<cstring, cstring> dirToDirMapping;
    ordered_map<cstring, cstring> inputToInputPortMapping;
    ordered_set<cstring> usedNames;
    cstring registerInstanceName;
 
 public:
    DirectionToRegRead() {
        dirToDirMapping.insert(std::make_pair(cstring("pna_main_input_metadata_direction"),
                                              cstring("pna_main_input_metadata_direction")));
        dirToDirMapping.insert(std::make_pair(cstring("pna_pre_input_metadata_direction"),
                                              cstring("pna_main_input_metadata_direction")));
        dirToDirMapping.insert(std::make_pair(cstring("pna_main_parser_input_metadata_direction"),
                                              cstring("pna_main_input_metadata_direction")));
        inputToInputPortMapping.insert(
            std::make_pair(cstring("pna_main_input_metadata_input_port"),
                           cstring("pna_main_input_metadata_input_port")));
        inputToInputPortMapping.insert(
            std::make_pair(cstring("pna_pre_input_metadata_direction"),
                           cstring("pna_main_input_metadata_input_port")));
        inputToInputPortMapping.insert(
            std::make_pair(cstring("pna_main_parser_input_metadata_direction"),
                           cstring("pna_main_input_metadata_input_port")));
    }
    const IR::Node *preorder(IR::DpdkAsmProgram *p) override;
    const IR::Node *preorder(IR::Member *m) override;
 
    void uniqueNames(IR::DpdkAsmProgram *p);
    IR::DpdkExternDeclaration *addRegDeclInstance(cstring instanceName);
    IR::DpdkListStatement *replaceDirection(IR::DpdkListStatement *l);
    IR::IndexedVector<IR::DpdkAsmStatement> addRegReadStmtForDirection(
        IR::IndexedVector<IR::DpdkAsmStatement> stmts);
};

class PrependPassRecircId : public Transform {
    IR::IndexedVector<IR::DpdkAsmStatement> newStmts;
 
 public:
    PrependPassRecircId() {}
    bool isPass(const IR::Member *m);
    const IR::Node *postorder(IR::DpdkAction *a) override;
    const IR::Node *postorder(IR::DpdkListStatement *l) override;
    IR::IndexedVector<IR::DpdkAsmStatement> prependPassWithRecircid(
        IR::IndexedVector<IR::DpdkAsmStatement> stmts);
};
 
}  // namespace P4::DPDK
#endif  // BACKENDS_DPDK_DPDKMETADATA_H_