# Copyright (c) 2015-2018 Advanced Micro Devices, Inc.
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from m5.SimObject import SimObject
from m5.params import *
from m5.proxy import *
from m5.objects.Device import DmaVirtDevice
from m5.objects.VegaGPUTLB import VegaPagetableWalker


class HSAPacketProcessor(DmaVirtDevice):
    type = "HSAPacketProcessor"
    cxx_header = "dev/hsa/hsa_packet_processor.hh"
    cxx_class = "gem5::HSAPacketProcessor"

    pioAddr = Param.Addr("doorbell physical address")
    numHWQueues = Param.Int("Number of HW queues")
    # See:
    # Sooraj Puthoor et al., Oversubscribed Command Queues in GPUs. In the
    # proceedings of the 11th Workshop on General Purpose GPUs (GPGPU). 2018.
    wakeupDelay = Param.Tick(100000000, "Scheduling quantum")
    # This value was obtained empirically on Kaveri hardware via the KPS
    # benchmark from ATMI.
    # See: https://github.com/RadeonOpenCompute/atmi/tree/master/examples/
    #      runtime/kps
    pktProcessDelay = Param.Tick(4400000, "Packet processing delay")
    walker = Param.VegaPagetableWalker(
        VegaPagetableWalker(), "Page table walker"
    )