diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 2895d9d86f29..7ed5302b511a 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -2064,6 +2064,44 @@ void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev, } } +static uint32_t amdgpu_vm_get_block_size(uint64_t vm_size) +{ + /* Total bits covered by PD + PTs */ + unsigned bits = ilog2(vm_size) + 18; + + /* Make sure the PD is 4K in size up to 8GB address space. + Above that split equal between PD and PTs */ + if (vm_size <= 8) + return (bits - 9); + else + return ((bits + 3) / 2); +} + +/** + * amdgpu_vm_adjust_size - adjust vm size and block size + * + * @adev: amdgpu_device pointer + * @vm_size: the default vm size if it's set auto + */ +void amdgpu_vm_adjust_size(struct amdgpu_device *adev, uint64_t vm_size) +{ + /* adjust vm size firstly */ + if (amdgpu_vm_size == -1) + adev->vm_manager.vm_size = vm_size; + else + adev->vm_manager.vm_size = amdgpu_vm_size; + + /* block size depends on vm size */ + if (amdgpu_vm_block_size == -1) + adev->vm_manager.block_size = + amdgpu_vm_get_block_size(adev->vm_manager.vm_size); + else + adev->vm_manager.block_size = amdgpu_vm_block_size; + + DRM_INFO("vm size is %llu GB, block size is %u-bit\n", + adev->vm_manager.vm_size, adev->vm_manager.block_size); +} + /** * amdgpu_vm_init - initialize a vm instance * |