amdgpu_device.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
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
 
#ifndef __DEV_AMDGPU_AMDGPU_DEVICE_HH__
#define __DEV_AMDGPU_AMDGPU_DEVICE_HH__
 
#include <map>
 
#include "base/bitunion.hh"
#include "dev/amdgpu/amdgpu_defines.hh"
#include "dev/amdgpu/amdgpu_gfx.hh"
#include "dev/amdgpu/amdgpu_nbio.hh"
#include "dev/amdgpu/amdgpu_smu.hh"
#include "dev/amdgpu/amdgpu_vm.hh"
#include "dev/amdgpu/memory_manager.hh"
#include "dev/amdgpu/mmio_reader.hh"
#include "dev/io_device.hh"
#include "dev/pci/device.hh"
#include "enums/GfxVersion.hh"
#include "params/AMDGPUDevice.hh"
 
namespace gem5
{
 
class AMDGPUInterruptHandler;
class SDMAEngine;
class System;

class AMDGPUDevice : public PciEndpoint
{
  private:
    void dispatchAccess(PacketPtr pkt, bool read);

    void readFrame(PacketPtr pkt, Addr offset);
    void readDoorbell(PacketPtr pkt, Addr offset);
    void readMMIO(PacketPtr pkt, Addr offset);
 
    void writeFrame(PacketPtr pkt, Addr offset);
    void writeDoorbell(PacketPtr pkt, Addr offset);
    void writeMMIO(PacketPtr pkt, Addr offset);

    std::unordered_map<uint32_t, DoorbellInfo> doorbells;
    std::unordered_map<uint32_t, PacketPtr> pendingDoorbellPkts;

    AddrRange romRange;
    bool isROM(Addr addr) const { return romRange.contains(addr); }
    void readROM(PacketPtr pkt);
    void writeROM(PacketPtr pkt);

    AMDMMIOReader mmioReader;

    AMDGPUNbio nbio;
    AMDGPUGfx gfx;
    AMDGPUMemoryManager *gpuMemMgr;
    AMDGPUInterruptHandler *deviceIH;
    AMDGPUVM gpuvm;
    AMDGPUSmu smu;
    GPUCommandProcessor *cp;
 
    struct AddrRangeHasher
    {
        std::size_t operator()(const AddrRange& k) const
        {
            return k.start();
        }
    };
    std::unordered_map<int, PM4PacketProcessor *> pm4PktProcs;
    std::unordered_map<AddrRange, PM4PacketProcessor *,
                       AddrRangeHasher> pm4Ranges;
 
    // SDMAs mapped by doorbell offset
    std::unordered_map<uint32_t, SDMAEngine *> sdmaEngs;
    // SDMAs mapped by ID
    std::unordered_map<uint32_t, SDMAEngine *> sdmaIds;
    // SDMA ID to MMIO range
    std::unordered_map<uint32_t, AddrRange> sdmaMmios;
    // SDMA ID to function
    typedef void (SDMAEngine::*sdmaFuncPtr)(uint32_t);
    std::unordered_map<uint32_t, sdmaFuncPtr> sdmaFunc;

    bool checkpoint_before_mmios;
    int init_interrupt_count;
 
    // VMIDs data structures
    // map of pasids to vmids
    std::unordered_map<uint16_t, uint16_t> idMap;
    // map of doorbell offsets to vmids
    std::unordered_map<Addr, uint16_t> doorbellVMIDMap;
    // map of vmid to all queue ids using that vmid
    std::unordered_map<uint16_t, std::set<int>> usedVMIDs;
    // last vmid allocated by map_process PM4 packet
    uint16_t _lastVMID;
 
    /*
     * Backing store for GPU memory / framebuffer / VRAM
     */
    memory::PhysicalMemory deviceMem;
 
    /*
     * For multiple GPUs, use system memory to read ROM.
     */
    System *system;
 
    /* Device information */
    GfxVersion gfx_version = GfxVersion::gfx900;
    const int gpuId;
    Addr vramSize;
 
  protected:
    Tick writeConfig(PacketPtr pkt) override;
    Tick readConfig(PacketPtr pkt) override;
 
    Tick readDevice(PacketPtr pkt) override;
    Tick writeDevice(PacketPtr pkt) override;
 
  public:
    AMDGPUDevice(const AMDGPUDeviceParams &p);

    void intrPost();
 
    AddrRangeList getAddrRanges() const override;

    void serialize(CheckpointOut &cp) const override;
    void unserialize(CheckpointIn &cp) override;

    AMDGPUInterruptHandler* getIH() { return deviceIH; }
    SDMAEngine* getSDMAById(int id);
    SDMAEngine* getSDMAEngine(Addr offset);
    AMDGPUVM &getVM() { return gpuvm; }
    AMDGPUMemoryManager* getMemMgr() { return gpuMemMgr; }
    GPUCommandProcessor* CP() { return cp; }

    void setDoorbellType(uint32_t offset, QueueType qt, int ip_id = 0);
    void unsetDoorbell(uint32_t offset);
    void processPendingDoorbells(uint32_t offset);
    void setSDMAEngine(Addr offset, SDMAEngine *eng);

    uint32_t getRegVal(uint64_t addr);
    void setRegVal(uint64_t addr, uint32_t value);

    RequestorID vramRequestorId() { return gpuMemMgr->getRequestorID(); }
 
    /* HW context stuff */
    uint16_t lastVMID() { return _lastVMID; }
    uint16_t allocateVMID(uint16_t pasid);
    void deallocateVmid(uint16_t vmid);
    void deallocatePasid(uint16_t pasid);
    void deallocateAllQueues(bool unmap_static);
    void mapDoorbellToVMID(Addr doorbell, uint16_t vmid);
    uint16_t getVMID(Addr doorbell) { return doorbellVMIDMap[doorbell]; }
    std::unordered_map<uint16_t, std::set<int>>& getUsedVMIDs();
    void insertQId(uint16_t vmid, int id);
 
    /* Device information */
    GfxVersion getGfxVersion() const { return gfx_version; }
    int
    getGpuId() const
    {
        return gpuId;
    }
    Addr
    getVRAMSize() const
    {
        return vramSize;
    }
};
 
} // namespace gem5
 
#endif // __DEV_AMDGPU_AMDGPU_DEVICE_HH__