diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c index ddf716d27f3a..4b70123957df 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c @@ -1333,3 +1333,50 @@ int amdgpu_gmc_request_memory_partition(struct amdgpu_device *adev, return psp_memory_partition(&adev->psp, nps_mode); } + +static inline bool amdgpu_gmc_need_nps_switch_req(struct amdgpu_device *adev, + int req_nps_mode, + int cur_nps_mode) +{ + return (((BIT(req_nps_mode) & adev->gmc.supported_nps_modes) == + BIT(req_nps_mode)) && + req_nps_mode != cur_nps_mode); +} + +void amdgpu_gmc_prepare_nps_mode_change(struct amdgpu_device *adev) +{ + int req_nps_mode, cur_nps_mode, r; + struct amdgpu_hive_info *hive; + + if (amdgpu_sriov_vf(adev) || !adev->gmc.supported_nps_modes || + !adev->gmc.gmc_funcs->request_mem_partition_mode) + return; + + cur_nps_mode = adev->gmc.gmc_funcs->query_mem_partition_mode(adev); + hive = amdgpu_get_xgmi_hive(adev); + if (hive) { + req_nps_mode = atomic_read(&hive->requested_nps_mode); + if (!amdgpu_gmc_need_nps_switch_req(adev, req_nps_mode, + cur_nps_mode)) { + amdgpu_put_xgmi_hive(hive); + return; + } + r = amdgpu_xgmi_request_nps_change(adev, hive, req_nps_mode); + amdgpu_put_xgmi_hive(hive); + goto out; + } + + req_nps_mode = adev->gmc.requested_nps_mode; + if (!amdgpu_gmc_need_nps_switch_req(adev, req_nps_mode, cur_nps_mode)) + return; + + /* even if this fails, we should let driver unload w/o blocking */ + r = adev->gmc.gmc_funcs->request_mem_partition_mode(adev, req_nps_mode); +out: + if (r) + dev_err(adev->dev, "NPS mode change request failed\n"); + else + dev_info( + adev->dev, + "NPS mode change request done, reload driver to complete the change\n"); +} |