drm/amdkfd: Fix partial migration bugs
Migration range from system memory to VRAM, if system page can not be locked or unmapped, we do partial migration and leave some pages in system memory. Several bugs found to copy pages and update GPU mapping for this situation: 1. copy to vram should use migrate->npage which is total pages of range as npages, not migrate->cpages which is number of pages can be migrated. 2. After partial copy, set VRAM res cursor as j + 1, j is number of system pages copied plus 1 page to skip copy. 3. copy to ram, should collect all continuous VRAM pages and copy together. 4. Call amdgpu_vm_update_range, should pass in offset as bytes, not as number of pages. Signed-off-by:Philip Yang <Philip.Yang@amd.com> Reviewed-by:
Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by:
Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
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