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Non-contiguous VRAM cannot easily be mapped in TTM nor can non-visible VRAM easily be accessed. Add ttm_bo_access, which is similar to ttm_bo_vm_access, to access such memory. v4: - Fix checkpatch warnings (CI) v5: - Fix checkpatch warnings (CI) v6: - Fix kernel doc (Auld) v7: - Move ttm_bo_access to ttm_bo_vm.c (Christian) Cc: Christian König <christian.koenig@amd.com> Reported-by: Christoph Manszewski <christoph.manszewski@intel.com> Suggested-by: Thomas Hellström <thomas.hellstrom@linux.intel.com> Signed-off-by: Matthew Brost <matthew.brost@intel.com> Tested-by: Mika Kuoppala <mika.kuoppala@linux.intel.com> Reviewed-by: Matthew Auld <matthew.auld@intel.com> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://patchwork.freedesktop.org/patch/msgid/20241126174615.2665852-3-matthew.brost@intel.com