From: shaoyunl <shaoyun.liu@amd.com>
Date: Wed, 7 Sep 2022 03:05:11 +0000 (-0400)
Subject: drm/amdgpu: Use per device reset_domain for XGMI on sriov configuration
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=46c676600c715f833b066581247cd5a461e03441;p=linux.git

drm/amdgpu: Use per device reset_domain for XGMI on sriov configuration

For SRIOV configuration, host driver control the reset method(either FLR or
heavier chain reset). The host will notify the guest individually with FLR
message if individual GPU within the hive need to be reset. So for guest
side, no need to use hive->reset_domain to replace the original per
device reset_domain

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 62b26f0e37b07..e218043629953 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2453,17 +2453,19 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 		if (amdgpu_xgmi_add_device(adev) == 0) {
 			struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev);
 
-			if (!hive->reset_domain ||
-			    !amdgpu_reset_get_reset_domain(hive->reset_domain)) {
-				r = -ENOENT;
+			if (!amdgpu_sriov_vf(adev)) {
+				if (!hive->reset_domain ||
+				    !amdgpu_reset_get_reset_domain(hive->reset_domain)) {
+					r = -ENOENT;
+					amdgpu_put_xgmi_hive(hive);
+					goto init_failed;
+				}
+
+				/* Drop the early temporary reset domain we created for device */
+				amdgpu_reset_put_reset_domain(adev->reset_domain);
+				adev->reset_domain = hive->reset_domain;
 				amdgpu_put_xgmi_hive(hive);
-				goto init_failed;
 			}
-
-			/* Drop the early temporary reset domain we created for device */
-			amdgpu_reset_put_reset_domain(adev->reset_domain);
-			adev->reset_domain = hive->reset_domain;
-			amdgpu_put_xgmi_hive(hive);
 		}
 	}
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index d3b483aa81f83..10477ca52a41a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -391,24 +391,33 @@ struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev)
 		goto pro_end;
 	}
 
+	/**
+	 * Only init hive->reset_domain for none SRIOV configuration. For SRIOV,
+	 * Host driver decide how to reset the GPU either through FLR or chain reset.
+	 * Guest side will get individual notifications from the host for the FLR
+	 * if necessary.
+	 */
+	if (!amdgpu_sriov_vf(adev)) {
 	/**
 	 * Avoid recreating reset domain when hive is reconstructed for the case
-	 * of reset the devices in the XGMI hive during probe for SRIOV
+	 * of reset the devices in the XGMI hive during probe for passthrough GPU
 	 * See https://www.spinics.net/lists/amd-gfx/msg58836.html
 	 */
-	if (adev->reset_domain->type != XGMI_HIVE) {
-		hive->reset_domain = amdgpu_reset_create_reset_domain(XGMI_HIVE, "amdgpu-reset-hive");
-			if (!hive->reset_domain) {
-				dev_err(adev->dev, "XGMI: failed initializing reset domain for xgmi hive\n");
-				ret = -ENOMEM;
-				kobject_put(&hive->kobj);
-				kfree(hive);
-				hive = NULL;
-				goto pro_end;
-			}
-	} else {
-		amdgpu_reset_get_reset_domain(adev->reset_domain);
-		hive->reset_domain = adev->reset_domain;
+		if (adev->reset_domain->type != XGMI_HIVE) {
+			hive->reset_domain =
+				amdgpu_reset_create_reset_domain(XGMI_HIVE, "amdgpu-reset-hive");
+				if (!hive->reset_domain) {
+					dev_err(adev->dev, "XGMI: failed initializing reset domain for xgmi hive\n");
+					ret = -ENOMEM;
+					kobject_put(&hive->kobj);
+					kfree(hive);
+					hive = NULL;
+					goto pro_end;
+				}
+		} else {
+			amdgpu_reset_get_reset_domain(adev->reset_domain);
+			hive->reset_domain = adev->reset_domain;
+		}
 	}
 
 	hive->hive_id = adev->gmc.xgmi.hive_id;