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Currently, VAB implementation is using fixed number of access bits. This value can be computed using fb_mmu_vidmem_access_bit_size_f() value. - Modify VAB implementation to compute number of access bits. - Modify nvgpu_vab structure to hold VAB entry size corresponding to number of access bits. - Information given by nvgpu_vab structure is more related to the GPU than nvgpu_mm structure. Move nvgpu_vab struct element to gk20a struct. - Add fb.set_vab_buffer_address to update vab buffer address in hw registers. - Rename gr.vab_init HAL to gr.vab_reserve to avoid any confusion about when this HAL should be used. -Replace gr.vab_release and gr.vab_recover with gr.vab_configure HAL. Bug 3465734 Change-Id: I1b67bfa9be7728be5bda978c6bb87b196d55ab65 Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2659467 Reviewed-by: svcacv <svcacv@nvidia.com> Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com> Reviewed-by: Martin Radev <mradev@nvidia.com> Reviewed-by: Seema Khowala <seemaj@nvidia.com> GVS: Gerrit_Virtual_Submit