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-Earlier, with DMEM queue, if command needs in/out payload then space needs to be allocated in DMEM/FB-surface & copy payload in allocated space before sending command by providing payload info in sending command . -With FBQ, command in/out payload is also part of FB command queue element & not required to allocate separate space in DMEM/FB-surface, so added changes to handle FBQ payload request while sending command & also in response handler to extract data from out payload. JIRA NVGPU-1579 Bug 2487534 Change-Id: If3ca724c2776dc57bf6d394edf9bc10eaacd94f9 Signed-off-by: Mahantesh Kumbar <mkumbar@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/2004021 Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>