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drm/amdkfd: sever xgmi io link if host driver has disable sharing

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Host drivers can create partial hives per guest by disabling xgmi sharing
between certain peers in the main hive.
Typically, these partial hives are fully connected per guest session.
In the event that the host makes a mistake by adding a non-shared node
to a guest session, have the KFD reflect sharing disabled by severing
the IO link.

Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Tested-by: James Yao <yiqing.yao@amd.com>
Reviewed-by: Harish Kasiviswanathan <harish.kasiviswanathan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jonathan Kim
2024-09-20 11:46:05 -04:00
committed by Alex Deucher
parent 46186667f9
commit e46738a58f
3 changed files with 22 additions and 0 deletions
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17
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
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@@ -801,6 +801,23 @@ int amdgpu_xgmi_get_num_links(struct amdgpu_device *adev,
return -EINVAL;
}
bool amdgpu_xgmi_get_is_sharing_enabled(struct amdgpu_device *adev,
struct amdgpu_device *peer_adev)
{
struct psp_xgmi_topology_info *top = &adev->psp.xgmi_context.top_info;
int i;
/* Sharing should always be enabled for non-SRIOV. */
if (!amdgpu_sriov_vf(adev))
return true;
for (i = 0 ; i < top->num_nodes; ++i)
if (top->nodes[i].node_id == peer_adev->gmc.xgmi.node_id)
return !!top->nodes[i].is_sharing_enabled;
return false;
}
/*
* Devices that support extended data require the entire hive to initialize with
* the shared memory buffer flag set.