ebpfPsaControl.h

/*
Copyright 2022-present Orange
Copyright 2022-present Open Networking Foundation
 
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_EBPF_PSA_EBPFPSACONTROL_H_
#define BACKENDS_EBPF_PSA_EBPFPSACONTROL_H_
 
#include "backends/ebpf/ebpfControl.h"
#include "backends/ebpf/psa/externs/ebpfPsaChecksum.h"
#include "backends/ebpf/psa/externs/ebpfPsaRandom.h"
#include "backends/ebpf/psa/externs/ebpfPsaRegister.h"
#include "ebpfPsaTable.h"
 
namespace P4::EBPF {
 
class EBPFControlPSA;
 
class ControlBodyTranslatorPSA : public ControlBodyTranslator {
 public:
    explicit ControlBodyTranslatorPSA(const EBPFControlPSA *control);
 
    bool preorder(const IR::BaseAssignmentStatement *a) override { return notSupported(a); }
    bool preorder(const IR::AssignmentStatement *a) override;
 
    void processMethod(const P4::ExternMethod *method) override;
 
    virtual cstring getParamName(const IR::PathExpression *);
};
 
class ActionTranslationVisitorPSA : public ActionTranslationVisitor,
                                    public ControlBodyTranslatorPSA {
 protected:
    const EBPFTablePSA *table;
 
 public:
    ActionTranslationVisitorPSA(const EBPFProgram *program, cstring valueName,
                                const EBPFTablePSA *table);
 
    bool preorder(const IR::PathExpression *pe) override;
    bool isActionParameter(const IR::Expression *expression) const;
 
    void processMethod(const P4::ExternMethod *method) override;
    cstring getParamInstanceName(const IR::Expression *expression) const override;
    cstring getParamName(const IR::PathExpression *) override;
};
 
class EBPFControlPSA : public EBPFControl {
 public:
    bool timestampIsUsed = false;
 
    const IR::Parameter *user_metadata;
    const IR::Parameter *inputStandardMetadata;
    const IR::Parameter *outputStandardMetadata;
 
    std::map<cstring, EBPFHashPSA *> hashes;
    std::map<cstring, EBPFRandomPSA *> randoms;
    std::map<cstring, EBPFRegisterPSA *> registers;
    std::map<cstring, EBPFMeterPSA *> meters;
 
    EBPFControlPSA(const EBPFProgram *program, const IR::ControlBlock *control,
                   const IR::Parameter *parserHeaders)
        : EBPFControl(program, control, parserHeaders) {}
 
    void emit(CodeBuilder *builder) override;
    void emitTableTypes(CodeBuilder *builder) override;
    void emitTableInstances(CodeBuilder *builder) override;
    void emitTableInitializers(CodeBuilder *builder) override;
 
    EBPFRandomPSA *getRandomExt(cstring name) const {
        auto result = ::P4::get(randoms, name);
        BUG_CHECK(result != nullptr, "No random generator named %1%", name);
        return result;
    }
 
    EBPFRegisterPSA *getRegister(cstring name) const {
        auto result = ::P4::get(registers, name);
        BUG_CHECK(result != nullptr, "No register named %1%", name);
        return result;
    }
 
    EBPFHashPSA *getHash(cstring name) const {
        auto result = ::P4::get(hashes, name);
        BUG_CHECK(result != nullptr, "No hash named %1%", name);
        return result;
    }
 
    EBPFMeterPSA *getMeter(cstring name) const {
        auto result = ::P4::get(meters, name);
        BUG_CHECK(result != nullptr, "No meter named %1%", name);
        return result;
    }
 
    DECLARE_TYPEINFO(EBPFControlPSA, EBPFControl);
};
 
}  // namespace P4::EBPF
 
#endif /* BACKENDS_EBPF_PSA_EBPFPSACONTROL_H_ */