On SRIOV and VM environment, customer may need to switch to new vGPU indexes after hibernate and then resume the VM. For GPUs with XGMI, `vram_start` will change in this case, the VRAM aperture gpu address of VRAM BOs will also change. These gpu addresses need to be updated when resume. But these addresses are all over the KMD codebase, updating each of them is error-prone and not acceptable.
The solution is to use pdb0 page table to cover both vram and gart memory and use pdb0 virtual gpu address instead. When gpu indexes change, the virtual gpu address won't change. For psp and smu, pdb0's gpu address does not work, so the original gpu address is used instead. They need to be updated when resume with changed vGPUs. The last 2 patches fix the issues we hit when testing this feature. Samuel Zhang (6): drm/amdgpu: update XGMI physical node id and GMC configs on resume drm/amdgpu: update cached GPU addresses for PSP and ucode drm/amdgpu: update cached GPU addresses for SMU drm/amdgpu: enable pdb0 for hibernation on SRIOV drm/amdgpu: fix sdma ring test fail when resume from hibernation drm/amdgpu: fix fence fallback timer expired error drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 25 ++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 45 +++++++++++++++------- drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 7 +++- drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h | 1 + drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 8 +++- drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 24 ++++++++++++ drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | 3 ++ drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h | 2 + drivers/gpu/drm/amd/amdgpu/gfxhub_v1_2.c | 2 +- drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 39 +++++++++++++------ drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c | 30 ++++++++++++--- drivers/gpu/drm/amd/amdgpu/vega20_ih.c | 18 ++++++++- drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 30 +++++++++++++++ 14 files changed, 199 insertions(+), 36 deletions(-) -- 2.43.5
