drm/amdgpu: change amdgpu_ttm_set_active_vram_size

Instead of setting the active VRAM size directly provide a the info if
we can use the buffer functions or not.
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Chunming zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

@@ -1411,7 +1411,7 @@ int amdgpu_ttm_init(struct amdgpu_device *adev)
 		adev->gmc.visible_vram_size = vis_vram_limit;
 
 	/* Change the size here instead of the init above so only lpfn is affected */
-	amdgpu_ttm_set_active_vram_size(adev, adev->gmc.visible_vram_size);
+	amdgpu_ttm_set_buffer_funcs_status(adev, false);
 #ifdef CONFIG_64BIT
 	adev->mman.aper_base_kaddr = ioremap_wc(adev->gmc.aper_base,
 						adev->gmc.visible_vram_size);
@@ -1526,17 +1526,28 @@ void amdgpu_ttm_fini(struct amdgpu_device *adev)
 	DRM_INFO("amdgpu: ttm finalized\n");
 }
 
-/* this should only be called at bootup or when userspace
- * isn't running */
-void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size)
+/**
+ * amdgpu_ttm_set_buffer_funcs_status - enable/disable use of buffer functions
+ *
+ * @adev: amdgpu_device pointer
+ * @enable: true when we can use buffer functions.
+ *
+ * Enable/disable use of buffer functions during suspend/resume. This should
+ * only be called at bootup or when userspace isn't running.
+ */
+void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev, bool enable)
 {
-	struct ttm_mem_type_manager *man;
+	struct ttm_mem_type_manager *man = &adev->mman.bdev.man[TTM_PL_VRAM];
+	uint64_t size;
 
 	if (!adev->mman.initialized)
 		return;
 
-	man = &adev->mman.bdev.man[TTM_PL_VRAM];
 	/* this just adjusts TTM size idea, which sets lpfn to the correct value */
+	if (enable)
+		size = adev->gmc.real_vram_size;
+	else
+		size = adev->gmc.visible_vram_size;
 	man->size = size >> PAGE_SHIFT;
 }
 

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h

@@ -77,7 +77,8 @@ uint64_t amdgpu_vram_mgr_vis_usage(struct ttm_mem_type_manager *man);
 
 int amdgpu_ttm_init(struct amdgpu_device *adev);
 void amdgpu_ttm_fini(struct amdgpu_device *adev);
-void amdgpu_ttm_set_active_vram_size(struct amdgpu_device *adev, u64 size);
+void amdgpu_ttm_set_buffer_funcs_status(struct amdgpu_device *adev,
+					bool enable);
 
 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
 		       uint64_t dst_offset, uint32_t byte_count,

drivers/gpu/drm/amd/amdgpu/cik_sdma.c

@@ -310,7 +310,7 @@ static void cik_sdma_gfx_stop(struct amdgpu_device *adev)
 
 	if ((adev->mman.buffer_funcs_ring == sdma0) ||
 	    (adev->mman.buffer_funcs_ring == sdma1))
-		amdgpu_ttm_set_active_vram_size(adev, adev->gmc.visible_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, false);
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
@@ -510,7 +510,7 @@ static int cik_sdma_gfx_resume(struct amdgpu_device *adev)
 		}
 
 		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_active_vram_size(adev, adev->gmc.real_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;

drivers/gpu/drm/amd/amdgpu/sdma_v2_4.c

@@ -339,7 +339,7 @@ static void sdma_v2_4_gfx_stop(struct amdgpu_device *adev)
 
 	if ((adev->mman.buffer_funcs_ring == sdma0) ||
 	    (adev->mman.buffer_funcs_ring == sdma1))
-		amdgpu_ttm_set_active_vram_size(adev, adev->gmc.visible_vram_size);
+		amdgpu_ttm_set_buffer_funcs_status(adev, false);
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
@@ -484,7 +484,7 @@ static int sdma_v2_4_gfx_resume(struct amdgpu_device *adev)
 		}
 
 		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_active_vram_size(adev, adev->gmc.real_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;

drivers/gpu/drm/amd/amdgpu/sdma_v3_0.c

@@ -510,7 +510,7 @@ static void sdma_v3_0_gfx_stop(struct amdgpu_device *adev)
 
 	if ((adev->mman.buffer_funcs_ring == sdma0) ||
 	    (adev->mman.buffer_funcs_ring == sdma1))
-		amdgpu_ttm_set_active_vram_size(adev, adev->gmc.visible_vram_size);
+		amdgpu_ttm_set_buffer_funcs_status(adev, false);
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(mmSDMA0_GFX_RB_CNTL + sdma_offsets[i]);
@@ -750,7 +750,7 @@ static int sdma_v3_0_gfx_resume(struct amdgpu_device *adev)
 		}
 
 		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_active_vram_size(adev, adev->gmc.real_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;

drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c

@@ -426,7 +426,7 @@ static void sdma_v4_0_gfx_stop(struct amdgpu_device *adev)
 
 	if ((adev->mman.buffer_funcs_ring == sdma0) ||
 	    (adev->mman.buffer_funcs_ring == sdma1))
-		amdgpu_ttm_set_active_vram_size(adev, adev->gmc.visible_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, false);
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		rb_cntl = RREG32(sdma_v4_0_get_reg_offset(adev, i, mmSDMA0_GFX_RB_CNTL));
@@ -668,7 +668,7 @@ static int sdma_v4_0_gfx_resume(struct amdgpu_device *adev)
 		}
 
 		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_active_vram_size(adev, adev->gmc.real_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 
 	}
 

drivers/gpu/drm/amd/amdgpu/si_dma.c

@@ -121,7 +121,7 @@ static void si_dma_stop(struct amdgpu_device *adev)
 		WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl);
 
 		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_active_vram_size(adev, adev->gmc.visible_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, false);
 		ring->ready = false;
 	}
 }
@@ -184,7 +184,7 @@ static int si_dma_start(struct amdgpu_device *adev)
 		}
 
 		if (adev->mman.buffer_funcs_ring == ring)
-			amdgpu_ttm_set_active_vram_size(adev, adev->gmc.real_vram_size);
+			amdgpu_ttm_set_buffer_funcs_status(adev, true);
 	}
 
 	return 0;