From: Alex Deucher <alexander.deucher@amd.com>
Date: Thu, 6 Oct 2022 19:53:10 +0000 (-0400)
Subject: drm/amdgpu: fix SDMA suspend/resume on SR-IOV
X-Git-Tag: v6.1-rc5~176^2^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a98cec220aa4b2502704aa0196da1bdc9eb455b4;p=platform%2Fkernel%2Flinux-starfive.git

drm/amdgpu: fix SDMA suspend/resume on SR-IOV

Update all SDMA versions that support SR-IOV to properly
tear down the ttm buffer functions on suspend.

Tested-by: Bokun Zhang <Bokun.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
index 7b4195f18a7c..298fa11702e7 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
@@ -1940,8 +1940,11 @@ static int sdma_v4_0_hw_fini(void *handle)
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 	int i;
 
-	if (amdgpu_sriov_vf(adev))
+	if (amdgpu_sriov_vf(adev)) {
+		/* disable the scheduler for SDMA */
+		amdgpu_sdma_unset_buffer_funcs_helper(adev);
 		return 0;
+	}
 
 	for (i = 0; i < adev->sdma.num_instances; i++) {
 		amdgpu_irq_put(adev, &adev->sdma.ecc_irq,
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
index 783048e1b0ce..d4d9f196db83 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_0.c
@@ -1456,8 +1456,11 @@ static int sdma_v5_0_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	if (amdgpu_sriov_vf(adev))
+	if (amdgpu_sriov_vf(adev)) {
+		/* disable the scheduler for SDMA */
+		amdgpu_sdma_unset_buffer_funcs_helper(adev);
 		return 0;
+	}
 
 	sdma_v5_0_ctx_switch_enable(adev, false);
 	sdma_v5_0_enable(adev, false);
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
index c2ee53c2dd1b..809eca54fc61 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
@@ -1349,19 +1349,15 @@ static int sdma_v5_2_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	/*
-	 * Under SRIOV, the VF cannot single-mindedly stop SDMA engine
-	 * However, we still need to clean up the DRM entity
-	 * Therefore, we will re-enable SDMA afterwards.
-	 */
-	sdma_v5_2_ctx_switch_enable(adev, false);
-	sdma_v5_2_enable(adev, false);
-
 	if (amdgpu_sriov_vf(adev)) {
-		sdma_v5_2_enable(adev, true);
-		sdma_v5_2_ctx_switch_enable(adev, true);
+		/* disable the scheduler for SDMA */
+		amdgpu_sdma_unset_buffer_funcs_helper(adev);
+		return 0;
 	}
 
+	sdma_v5_2_ctx_switch_enable(adev, false);
+	sdma_v5_2_enable(adev, false);
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
index a6483483404e..da3beb0bf2fa 100644
--- a/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/sdma_v6_0.c
@@ -1311,8 +1311,11 @@ static int sdma_v6_0_hw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	if (amdgpu_sriov_vf(adev))
+	if (amdgpu_sriov_vf(adev)) {
+		/* disable the scheduler for SDMA */
+		amdgpu_sdma_unset_buffer_funcs_helper(adev);
 		return 0;
+	}
 
 	sdma_v6_0_ctx_switch_enable(adev, false);
 	sdma_v6_0_enable(adev, false);