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drm/amdgpu: XGMI pstate switch initial support

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Driver vote low to high pstate switch whenever there is an outstanding
XGMI mapping request. Driver vote high to low pstate when all the
outstanding XGMI mapping is terminated.

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
shaoyunl
2019-03-20 16:14:56 -04:00
committed by Alex Deucher
parent adc7e863f6
commit df399b0641
6 changed files with 56 additions and 1 deletions
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21
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@@ -34,6 +34,7 @@
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"
#include "amdgpu_gmc.h"
#include "amdgpu_xgmi.h"
/**
* DOC: GPUVM
@@ -2045,6 +2046,15 @@ struct amdgpu_bo_va *amdgpu_vm_bo_add(struct amdgpu_device *adev,
INIT_LIST_HEAD(&bo_va->valids);
INIT_LIST_HEAD(&bo_va->invalids);
if (bo && amdgpu_xgmi_same_hive(adev, amdgpu_ttm_adev(bo->tbo.bdev))) {
bo_va->is_xgmi = true;
mutex_lock(&adev->vm_manager.lock_pstate);
/* Power up XGMI if it can be potentially used */
if (++adev->vm_manager.xgmi_map_counter == 1)
amdgpu_xgmi_set_pstate(adev, 1);
mutex_unlock(&adev->vm_manager.lock_pstate);
}
return bo_va;
}
@@ -2463,6 +2473,14 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
}
dma_fence_put(bo_va->last_pt_update);
if (bo && bo_va->is_xgmi) {
mutex_lock(&adev->vm_manager.lock_pstate);
if (--adev->vm_manager.xgmi_map_counter == 0)
amdgpu_xgmi_set_pstate(adev, 0);
mutex_unlock(&adev->vm_manager.lock_pstate);
}
kfree(bo_va);
}
@@ -2970,6 +2988,9 @@ void amdgpu_vm_manager_init(struct amdgpu_device *adev)
idr_init(&adev->vm_manager.pasid_idr);
spin_lock_init(&adev->vm_manager.pasid_lock);
adev->vm_manager.xgmi_map_counter = 0;
mutex_init(&adev->vm_manager.lock_pstate);
}
/**