[PATCH] drm/amdgpu: revert "XGMI pstate switch initial support"

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This reverts commit c9115f8904eef0f880d3b4f8306f553b1bb1c532.

Adding this to the mapping is complete nonsense and the whole
implementation looks racy. This patch wasn't thoughtfully reviewed
and should be reverted for now.

Signed-off-by: Christian König <christian.koenig@xxxxxxx>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  3 ---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c |  3 ---
 drivers/gpu/drm/amd/amdgpu/amdgpu_object.h |  1 -
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c     | 29 +---------------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c   | 15 -----------
 drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h   |  2 --
 6 files changed, 1 insertion(+), 52 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index b5720c1610e1..1db192150532 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -931,9 +931,6 @@ struct amdgpu_device {
 	int asic_reset_res;
 	struct work_struct		xgmi_reset_work;
 
-	/* counter of mapped memory through xgmi */
-	atomic_t			xgmi_map_counter;
-
 	bool                            in_baco_reset;
 };
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 964a4d3f1f43..206583707124 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2018,9 +2018,6 @@ static void amdgpu_device_ip_late_init_func_handler(struct work_struct *work)
 	r = amdgpu_device_enable_mgpu_fan_boost();
 	if (r)
 		DRM_ERROR("enable mgpu fan boost failed (%d).\n", r);
-
-	/*set to low pstate by default */
-	amdgpu_xgmi_set_pstate(adev, 0);
 }
 
 static void amdgpu_device_delay_enable_gfx_off(struct work_struct *work)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 6f176bbe4cf2..220a6a7b1bc1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -54,7 +54,6 @@ struct amdgpu_bo_va_mapping {
 	uint64_t			__subtree_last;
 	uint64_t			offset;
 	uint64_t			flags;
-	bool				is_xgmi;
 };
 
 /* User space allocated BO in a VM */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index c5230a9fb7f6..c8f0e4ca05fb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -34,7 +34,6 @@
 #include "amdgpu_trace.h"
 #include "amdgpu_amdkfd.h"
 #include "amdgpu_gmc.h"
-#include "amdgpu_xgmi.h"
 
 /**
  * DOC: GPUVM
@@ -2022,9 +2021,8 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
 	struct ttm_mem_reg *mem;
 	struct drm_mm_node *nodes;
 	struct dma_fence *exclusive, **last_update;
-	struct amdgpu_device *bo_adev = adev;
-	bool is_xgmi = false;
 	uint64_t flags;
+	struct amdgpu_device *bo_adev = adev;
 	int r;
 
 	if (clear || !bo) {
@@ -2046,10 +2044,6 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
 	if (bo) {
 		flags = amdgpu_ttm_tt_pte_flags(adev, bo->tbo.ttm, mem);
 		bo_adev = amdgpu_ttm_adev(bo->tbo.bdev);
-		if (adev != bo_adev &&
-		    adev->gmc.xgmi.hive_id &&
-		    adev->gmc.xgmi.hive_id == bo_adev->gmc.xgmi.hive_id)
-			is_xgmi = true;
 	} else {
 		flags = 0x0;
 	}
@@ -2068,19 +2062,6 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
 	}
 
 	list_for_each_entry(mapping, &bo_va->invalids, list) {
-		if (mapping->is_xgmi != is_xgmi) {
-			if (is_xgmi) {
-				/* Adding an XGMI mapping to the PT */
-				if (atomic_inc_return(&adev->xgmi_map_counter) == 1)
-					amdgpu_xgmi_set_pstate(adev, 1);
-			} else {
-				/* Removing an XGMI mapping from the PT */
-				if (atomic_dec_return(&adev->xgmi_map_counter) == 0)
-					amdgpu_xgmi_set_pstate(adev, 0);
-			}
-			mapping->is_xgmi = is_xgmi;
-		}
-
 		r = amdgpu_vm_bo_split_mapping(adev, exclusive, pages_addr, vm,
 					       mapping, flags, bo_adev, nodes,
 					       last_update);
@@ -2298,13 +2279,6 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
 		r = amdgpu_vm_bo_update_mapping(adev, NULL, NULL, vm,
 						mapping->start, mapping->last,
 						init_pte_value, 0, &f);
-
-		if (mapping->is_xgmi) {
-			/* Removing an XGMI mapping from the PT */
-			if (atomic_dec_return(&adev->xgmi_map_counter) == 0)
-				amdgpu_xgmi_set_pstate(adev, 0);
-		}
-
 		amdgpu_vm_free_mapping(adev, vm, mapping, f);
 		if (r) {
 			dma_fence_put(f);
@@ -2501,7 +2475,6 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
 	mapping->last = eaddr;
 	mapping->offset = offset;
 	mapping->flags = flags;
-	mapping->is_xgmi = false;
 
 	amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index 807440d3edff..fcc4b05c745c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -200,7 +200,6 @@ struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lo
 
 	if (lock)
 		mutex_lock(&tmp->hive_lock);
-	tmp->pstate = -1;
 
 	mutex_unlock(&xgmi_mutex);
 
@@ -322,17 +321,3 @@ void amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
 		mutex_unlock(&hive->hive_lock);
 	}
 }
-
-int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate)
-{
-	int ret = 0;
-	struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, 0);
-
-	if (!hive)
-		return 0;
-
-	if (hive->pstate == pstate)
-		return 0;
-	/* Todo : sent the message to SMU for pstate change */
-	return ret;
-}
\ No newline at end of file
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
index 7e1710fcbef2..24a3b0362f98 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
@@ -33,13 +33,11 @@ struct amdgpu_hive_info {
 	struct kobject *kobj;
 	struct device_attribute dev_attr;
 	struct amdgpu_device *adev;
-	int pstate; /*0 -- low , 1 -- high , -1 unknown*/
 };
 
 struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock);
 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);
-int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate);
 
 #endif
-- 
2.17.1

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