interrupt_handler.hh

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/*
 * Copyright (c) 2021 Advanced Micro Devices, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 */
 
#ifndef __DEV_AMDGPU_INTERRUPT_HANDLER__
#define __DEV_AMDGPU_INTERRUPT_HANDLER__
 
#include <bitset>
#include <iostream>
#include <queue>
#include <vector>
 
#include "base/addr_range.hh"
#include "base/flags.hh"
#include "base/types.hh"
#include "dev/amdgpu/amdgpu_device.hh"
#include "dev/dma_device.hh"
#include "params/AMDGPUInterruptHandler.hh"
 
namespace gem5
{
 
enum soc15_ih_clientid
{
    SOC15_IH_CLIENTID_RLC       = 0x07,
    SOC15_IH_CLIENTID_SDMA0     = 0x08,
    SOC15_IH_CLIENTID_SDMA1     = 0x09,
    SOC15_IH_CLIENTID_SDMA2     = 0x01,
    SOC15_IH_CLIENTID_SDMA3     = 0x04,
    SOC15_IH_CLIENTID_SDMA4     = 0x05,
    SOC15_IH_CLIENTID_SDMA5     = 0x11,
    SOC15_IH_CLIENTID_SDMA6     = 0x13,
    SOC15_IH_CLIENTID_SDMA7     = 0x18,
    SOC15_IH_CLIENTID_GRBM_CP   = 0x14
};
 
enum ihSourceId
{
    CP_EOP                      = 181,
    TRAP_ID                     = 224
};
 
constexpr uint32_t INTR_COOKIE_SIZE = 32; // in bytes
 
typedef struct
{
    uint32_t clientId : 8;
    uint32_t sourceId : 8;
    uint32_t ringId : 8;
    uint32_t vmId : 4;
    uint32_t reserved1 : 3;
    uint32_t vmid_type : 1;
    uint32_t timestamp_Lo;
    uint32_t timestamp_Hi : 16;
    uint32_t reserved2 : 15;
    uint32_t timestamp_src : 1;
    uint32_t pasid : 16;
    uint32_t reserved3 : 15;
    uint32_t pasid_src : 1;
    uint32_t source_data_dw1;
    uint32_t source_data_dw2;
    uint32_t source_data_dw3;
    uint32_t source_data_dw4;
} AMDGPUInterruptCookie;
static_assert(sizeof(AMDGPUInterruptCookie) == INTR_COOKIE_SIZE);
 
typedef struct
{
    uint32_t IH_Cntl;
    uint32_t IH_Base;
    uint32_t IH_Base_Hi;
    Addr baseAddr;
    uint32_t IH_Rptr;
    uint32_t IH_Wptr;
    uint32_t IH_Wptr_Addr_Lo;
    uint32_t IH_Wptr_Addr_Hi;
    Addr WptrAddr;
    uint32_t IH_Doorbell;
} AMDGPUIHRegs;
 
class AMDGPUInterruptHandler : public DmaDevice
{
  public:
    class DmaEvent : public Event
    {
      private:
        AMDGPUInterruptHandler *deviceIh;
        uint32_t data;
 
      public:
        DmaEvent(AMDGPUInterruptHandler *deviceIh, uint32_t data)
            : Event(), deviceIh(deviceIh), data(data)
        {
            setFlags(Event::AutoDelete);
        }
        void process();
        const char *description() const {
            return "AMDGPUInterruptHandler Dma";
        }
 
        void setData(uint32_t _data) { data = _data; }
        uint32_t getData() { return data; }
    };
 
    struct SenderState : public Packet::SenderState
    {
        SenderState(Packet::SenderState *sender_state, Addr addr)
            : saved(sender_state), _addr(addr)
        {
        }
        Packet::SenderState *saved;
        Addr _addr;
    };
 
    AMDGPUInterruptHandler(const AMDGPUInterruptHandlerParams &p);
 
    Tick write(PacketPtr pkt) override { return 0; }
    Tick read(PacketPtr pkt) override { return 0; }
    AddrRangeList getAddrRanges() const override;
    void serialize(CheckpointOut &cp) const override;
    void unserialize(CheckpointIn &cp) override;
 
    void setGPUDevice(AMDGPUDevice *gpu_device) { gpuDevice = gpu_device; }
    void prepareInterruptCookie(ContextID cntxtId, uint32_t ring_id,
        uint32_t client_id, uint32_t source_id);
    void submitInterruptCookie();
    void submitWritePointer();
    void intrPost();
 
    void writeMMIO(PacketPtr pkt, Addr mmio_offset);
 
    uint32_t getDoorbellOffset() const { return regs.IH_Doorbell; }
    void setCntl(const uint32_t &data);
    void setBase(const uint32_t &data);
    void setBaseHi(const uint32_t &data);
    void setRptr(const uint32_t &data);
    void setWptr(const uint32_t &data);
    void setWptrAddrLo(const uint32_t &data);
    void setWptrAddrHi(const uint32_t &data);
    void setDoorbellOffset(const uint32_t &data);
    void updateRptr(const uint32_t &data);
 
  private:
    AMDGPUDevice *gpuDevice;
    AMDGPUIHRegs regs;
    std::queue<AMDGPUInterruptCookie*> interruptQueue;
    AMDGPUInterruptHandler::DmaEvent *dmaEvent;
};
 
} // namespace gem5
 
#endif // __DEV_AMDGPU_INTERRUPT_HANDLER__