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From b15d2a4a2436144a11919630bde2a8d37e2b9cb8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Thu, 28 Nov 2019 14:51:46 +0100
Subject: [PATCH 4722/4736] drm/amdgpu: move VM eviction decision into
amdgpu_vm.c
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
When a page tables needs to be evicted the VM code should
decide if that is possible or not.
Change-Id: Ib9a934b37a39f06caeb15d7375fb1c4fc8f9b51c
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 5 +----
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 22 ++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h | 1 +
3 files changed, 24 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index d93bfaca5daf..4e36ce46455f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1624,11 +1624,8 @@ static bool amdgpu_ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
struct dma_fence *f;
int i;
- /* Don't evict VM page tables while they are busy, otherwise we can't
- * cleanly handle page faults.
- */
if (bo->type == ttm_bo_type_kernel &&
- !reservation_object_test_signaled_rcu(bo->resv, true))
+ !amdgpu_vm_evictable(ttm_to_amdgpu_bo(bo)))
return false;
/* If bo is a KFD BO, check if the bo belongs to the current process.
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 90ac5390ecdf..f47158087b83 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -2504,6 +2504,28 @@ void amdgpu_vm_bo_rmv(struct amdgpu_device *adev,
kfree(bo_va);
}
+/**
+ * amdgpu_vm_evictable - check if we can evict a VM
+ *
+ * @bo: A page table of the VM.
+ *
+ * Check if it is possible to evict a VM.
+ */
+bool amdgpu_vm_evictable(struct amdgpu_bo *bo)
+{
+ struct amdgpu_vm_bo_base *bo_base = bo->vm_bo;
+
+ /* Page tables of a destroyed VM can go away immediately */
+ if (!bo_base || !bo_base->vm)
+ return true;
+
+ /* Don't evict VM page tables while they are busy */
+ if (!reservation_object_test_signaled_rcu(bo->tbo.resv, true))
+ return false;
+
+ return true;
+}
+
/**
* amdgpu_vm_bo_invalidate - mark the bo as invalid
*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 76fcf853035c..db561765453b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -381,6 +381,7 @@ int amdgpu_vm_handle_moved(struct amdgpu_device *adev,
int amdgpu_vm_bo_update(struct amdgpu_device *adev,
struct amdgpu_bo_va *bo_va,
bool clear);
+bool amdgpu_vm_evictable(struct amdgpu_bo *bo);
void amdgpu_vm_bo_invalidate(struct amdgpu_device *adev,
struct amdgpu_bo *bo, bool evicted);
uint64_t amdgpu_vm_map_gart(const dma_addr_t *pages_addr, uint64_t addr);
--
2.17.1
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