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From f2e1bfbfbb3e9349507db9812c1b10917f51ff84 Mon Sep 17 00:00:00 2001
From: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Date: Thu, 29 Nov 2018 12:21:53 -0500
Subject: [PATCH 0895/2940] drm/amdgpu: Handle xgmi device removal.
XGMI hive has some resources allocted on device init which
needs to be deallocated when the device is unregistered.
v2: Remove creation of dedicated wq for XGMI hive reset.
v3: Use the gmc.xgmi.supported flag
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 20 ++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h | 1 +
3 files changed, 24 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 8812dce453ad..372b2a0131b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1912,6 +1912,9 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
{
int i, r;
+ if (adev->gmc.xgmi.num_physical_nodes > 1)
+ amdgpu_xgmi_remove_device(adev);
+
amdgpu_amdkfd_device_fini(adev);
amdgpu_device_set_pg_state(adev, AMD_PG_STATE_UNGATE);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index f8c86d0593dd..1b15ff3266b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -135,3 +135,23 @@ int amdgpu_xgmi_add_device(struct amdgpu_device *adev)
mutex_unlock(&xgmi_mutex);
return ret;
}
+
+void amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
+{
+ struct amdgpu_hive_info *hive;
+
+ if (!adev->gmc.xgmi.supported)
+ return;
+
+ mutex_lock(&xgmi_mutex);
+
+ hive = amdgpu_get_xgmi_hive(adev);
+ if (!hive)
+ goto exit;
+
+ if (!(hive->number_devices--))
+ mutex_destroy(&hive->hive_lock);
+
+exit:
+ mutex_unlock(&xgmi_mutex);
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
index 6335bfdcc51d..6151eb9c8ad3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
@@ -35,5 +35,6 @@ struct amdgpu_hive_info {
struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev);
int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);
int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
+void amdgpu_xgmi_remove_device(struct amdgpu_device *adev);
#endif
--
2.17.1
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