drm/amdgpu: Reset the devices in the XGMI hive duirng probe

In passthrough configuration, hypervisior will trigger the SBR(Secondary bus reset) to the devices
without sync to each other. This could cause device hang since for XGMI configuration, all the devices
within the hive need to be reset at a limit time slot. This serial of patches try to solve this issue
by co-operate with new SMU which will only do minimum house keeping to response the SBR request but don't
do the real reset job and leave it to driver. Driver need to do the whole sw init and minimum HW init
to bring up the SMU and trigger the reset(possibly BACO) on all the ASICs at the same time

Signed-off-by: shaoyunl <shaoyun.liu@amd.com>
Acked-by: Andrey Grodzovsky andrey.grodzovsky@amd.com
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 75 insertions, 27 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 0b3db212b5a4..a7cd238654eb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1224,6 +1224,10 @@ bool amdgpu_device_need_post(struct amdgpu_device *adev)
 		}
 	}
 
+	/* Don't post if we need to reset whole hive on init */
+	if (adev->gmc.xgmi.pending_reset)
+		return false;
+
 	if (adev->has_hw_reset) {
 		adev->has_hw_reset = false;
 		return true;
@@ -2154,6 +2158,9 @@ static int amdgpu_device_fw_loading(struct amdgpu_device *adev)
 			if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_PSP)
 				continue;
 
+			if (!adev->ip_blocks[i].status.sw)
+				continue;
+
 			/* no need to do the fw loading again if already done*/
 			if (adev->ip_blocks[i].status.hw == true)
 				break;
@@ -2294,7 +2301,10 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 
 	if (adev->gmc.xgmi.num_physical_nodes > 1)
 		amdgpu_xgmi_add_device(adev);
-	amdgpu_amdkfd_device_init(adev);
+
+	/* Don't init kfd if whole hive need to be reset during init */
+	if (!adev->gmc.xgmi.pending_reset)
+		amdgpu_amdkfd_device_init(adev);
 
 	amdgpu_fru_get_product_info(adev);
 
@@ -2739,6 +2749,16 @@ static int amdgpu_device_ip_suspend_phase2(struct amdgpu_device *adev)
 			adev->ip_blocks[i].status.hw = false;
 			continue;
 		}
+
+		/* skip unnecessary suspend if we do not initialize them yet */
+		if (adev->gmc.xgmi.pending_reset &&
+		    !(adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC ||
+		      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC ||
+		      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON ||
+		      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH)) {
+			adev->ip_blocks[i].status.hw = false;
+			continue;
+		}
 		/* XXX handle errors */
 		r = adev->ip_blocks[i].version->funcs->suspend(adev);
 		/* XXX handle errors */
@@ -3414,10 +3434,28 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	 *  E.g., driver was not cleanly unloaded previously, etc.
 	 */
 	if (!amdgpu_sriov_vf(adev) && amdgpu_asic_need_reset_on_init(adev)) {
-		r = amdgpu_asic_reset(adev);
-		if (r) {
-			dev_err(adev->dev, "asic reset on init failed\n");
-			goto failed;
+		if (adev->gmc.xgmi.num_physical_nodes) {
+			dev_info(adev->dev, "Pending hive reset.\n");
+			adev->gmc.xgmi.pending_reset = true;
+			/* Only need to init necessary block for SMU to handle the reset */
+			for (i = 0; i < adev->num_ip_blocks; i++) {
+				if (!adev->ip_blocks[i].status.valid)
+					continue;
+				if (!(adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC ||
+				      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_COMMON ||
+				      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_IH ||
+				      adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC)) {
+					DRM_DEBUG("IP %s disabed for hw_init.\n",
+						adev->ip_blocks[i].version->funcs->name);
+					adev->ip_blocks[i].status.hw = true;
+				}
+			}
+		} else {
+			r = amdgpu_asic_reset(adev);
+			if (r) {
+				dev_err(adev->dev, "asic reset on init failed\n");
+				goto failed;
+			}
 		}
 	}
 
@@ -3548,19 +3586,19 @@ fence_driver_init:
 	/* enable clockgating, etc. after ib tests, etc. since some blocks require
 	 * explicit gating rather than handling it automatically.
 	 */
-	r = amdgpu_device_ip_late_init(adev);
-	if (r) {
-		dev_err(adev->dev, "amdgpu_device_ip_late_init failed\n");
-		amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_AMDGPU_LATE_INIT_FAIL, 0, r);
-		goto failed;
+	if (!adev->gmc.xgmi.pending_reset) {
+		r = amdgpu_device_ip_late_init(adev);
+		if (r) {
+			dev_err(adev->dev, "amdgpu_device_ip_late_init failed\n");
+			amdgpu_vf_error_put(adev, AMDGIM_ERROR_VF_AMDGPU_LATE_INIT_FAIL, 0, r);
+			goto failed;
+		}
+		/* must succeed. */
+		amdgpu_ras_resume(adev);
+		queue_delayed_work(system_wq, &adev->delayed_init_work,
+				   msecs_to_jiffies(AMDGPU_RESUME_MS));
 	}
 
-	/* must succeed. */
-	amdgpu_ras_resume(adev);
-
-	queue_delayed_work(system_wq, &adev->delayed_init_work,
-			   msecs_to_jiffies(AMDGPU_RESUME_MS));
-
 	if (amdgpu_sriov_vf(adev))
 		flush_delayed_work(&adev->delayed_init_work);
 
@@ -3577,6 +3615,10 @@ fence_driver_init:
 	if (amdgpu_device_cache_pci_state(adev->pdev))
 		pci_restore_state(pdev);
 
+	if (adev->gmc.xgmi.pending_reset)
+		queue_delayed_work(system_wq, &mgpu_info.delayed_reset_work,
+				   msecs_to_jiffies(AMDGPU_RESUME_MS));
+
 	return 0;
 
 failed:
@@ -4287,14 +4329,16 @@ int amdgpu_device_mode1_reset(struct amdgpu_device *adev)
         return ret;
 }
 
-static int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
-					struct amdgpu_job *job,
-					bool *need_full_reset_arg)
+int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
+				  struct amdgpu_job *job,
+				  bool *need_full_reset_arg)
 {
 	int i, r = 0;
 	bool need_full_reset  = *need_full_reset_arg;
 
-	amdgpu_debugfs_wait_dump(adev);
+	/* no need to dump if device is not in good state during probe period */
+	if (!adev->gmc.xgmi.pending_reset)
+		amdgpu_debugfs_wait_dump(adev);
 
 	if (amdgpu_sriov_vf(adev)) {
 		/* stop the data exchange thread */
@@ -4340,10 +4384,10 @@ static int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
 	return r;
 }
 
-static int amdgpu_do_asic_reset(struct amdgpu_hive_info *hive,
-			       struct list_head *device_list_handle,
-			       bool *need_full_reset_arg,
-			       bool skip_hw_reset)
+int amdgpu_do_asic_reset(struct amdgpu_hive_info *hive,
+			  struct list_head *device_list_handle,
+			  bool *need_full_reset_arg,
+			  bool skip_hw_reset)
 {
 	struct amdgpu_device *tmp_adev = NULL;
 	bool need_full_reset = *need_full_reset_arg, vram_lost = false;
@@ -4357,6 +4401,7 @@ static int amdgpu_do_asic_reset(struct amdgpu_hive_info *hive,
 		list_for_each_entry(tmp_adev, device_list_handle, reset_list) {
 			/* For XGMI run all resets in parallel to speed up the process */
 			if (tmp_adev->gmc.xgmi.num_physical_nodes > 1) {
+				tmp_adev->gmc.xgmi.pending_reset = false;
 				if (!queue_work(system_unbound_wq, &tmp_adev->xgmi_reset_work))
 					r = -EALREADY;
 			} else
@@ -4395,10 +4440,10 @@ static int amdgpu_do_asic_reset(struct amdgpu_hive_info *hive,
 	list_for_each_entry(tmp_adev, device_list_handle, reset_list) {
 		if (need_full_reset) {
 			/* post card */
-			if (amdgpu_device_asic_init(tmp_adev))
+			r = amdgpu_device_asic_init(tmp_adev);
+			if (r) {
 				dev_warn(tmp_adev->dev, "asic atom init failed!");
-
-			if (!r) {
+			} else {
 				dev_info(tmp_adev->dev, "GPU reset succeeded, trying to resume\n");
 				r = amdgpu_device_ip_resume_phase1(tmp_adev);
 				if (r)
@@ -4431,6 +4476,9 @@ static int amdgpu_do_asic_reset(struct amdgpu_hive_info *hive,
 				 */
 				amdgpu_register_gpu_instance(tmp_adev);
 
+				if (!hive && tmp_adev->gmc.xgmi.num_physical_nodes > 1)
+					amdgpu_xgmi_add_device(tmp_adev);
+
 				r = amdgpu_device_ip_late_init(tmp_adev);
 				if (r)
 					goto out;