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      amdkfd: Add device queue manager module · 64c7f8cf
      Ben Goz 提交于
      The queue scheduler divides into two sections, one section is process bounded
      and the other section is device bounded.
      The device bounded section is handled by this module.
      The DQM module handles queue setup, update and tear-down from the device side.
      It also supports suspend/resume operation.
      
      v3: Changed device_init, added the use of the new gart allocation functions an
      Added documentation.
      
      v4:
      
      Fixed a race in DQM queue scheduler where dqm->lock must be held when accessing
      dqm->queue_count and dqm->processes_count. This fixes runlist IB allocation
      failures when DQM is under load.
      
      Fixed race in DQM queue destruction where queues being destroyed must be
      removed from qpd->queues_list prior to preemption, or concurrent queue
      creation activity may reschedule them while their MQD is destroyed.
      
      Fixed EOP queue size setting in CP_HPD_EOP_CONTROL, because the size is
      specified as (log2(size_dwords)-1). The previous calculation assumed the
      size was specified in bytes, which caused interference between EOP queues
      when multiple MEC pipelines were active.
      
      v5:
      
      Move amdkfd from drm/radeon/ to drm/amd/
      Change format of mqd structure to match latest KV firmware
      Add support for AQL queues creation to enable working with open-source HSA
      runtime
      Remove unused unmap_queue function
      Various fixes (Style, typos)
      Signed-off-by: NBen Goz <ben.goz@amd.com>
      Signed-off-by: NJay Cornwall <jay.cornwall@amd.com>
      Signed-off-by: NOded Gabbay <oded.gabbay@amd.com>
      64c7f8cf