1 files changed, 229 insertions, 128 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index af9bdf16eefd..a8b08a72b71b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -30,6 +30,7 @@
 #include <linux/module.h>
 #include <linux/console.h>
 #include <linux/slab.h>
+#include <linux/iommu.h>
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_probe_helper.h>
@@ -125,6 +126,7 @@ const char *amdgpu_asic_name[] = {
 	"DIMGREY_CAVEFISH",
 	"BEIGE_GOBY",
 	"YELLOW_CARP",
+	"IP DISCOVERY",
 	"LAST",
 };
 
@@ -305,7 +307,7 @@ void amdgpu_device_mm_access(struct amdgpu_device *adev, loff_t pos,
 	uint64_t last;
 	int idx;
 
-	if (!drm_dev_enter(&adev->ddev, &idx))
+	if (!drm_dev_enter(adev_to_drm(adev), &idx))
 		return;
 
 	BUG_ON(!IS_ALIGNED(pos, 4) || !IS_ALIGNED(size, 4));
@@ -330,7 +332,7 @@ void amdgpu_device_mm_access(struct amdgpu_device *adev, loff_t pos,
 }
 
 /**
- * amdgpu_device_vram_access - access vram by vram aperature
+ * amdgpu_device_aper_access - access vram by vram aperature
  *
  * @adev: amdgpu_device pointer
  * @pos: offset of the buffer in vram
@@ -549,11 +551,11 @@ void amdgpu_device_wreg(struct amdgpu_device *adev,
 	trace_amdgpu_device_wreg(adev->pdev->device, reg, v);
 }
 
-/*
+/**
  * amdgpu_mm_wreg_mmio_rlc -  write register either with mmio or with RLC path if in range
  *
  * this function is invoked only the debugfs register access
- * */
+ */
 void amdgpu_mm_wreg_mmio_rlc(struct amdgpu_device *adev,
 			     uint32_t reg, uint32_t v)
 {
@@ -1099,7 +1101,7 @@ static void amdgpu_device_wb_fini(struct amdgpu_device *adev)
 }
 
 /**
- * amdgpu_device_wb_init- Init Writeback driver info and allocate memory
+ * amdgpu_device_wb_init - Init Writeback driver info and allocate memory
  *
  * @adev: amdgpu_device pointer
  *
@@ -2126,46 +2128,11 @@ static int amdgpu_device_ip_early_init(struct amdgpu_device *adev)
 		if (r)
 			return r;
 		break;
-	case CHIP_VEGA10:
-	case CHIP_VEGA12:
-	case CHIP_VEGA20:
-	case CHIP_RAVEN:
-	case CHIP_ARCTURUS:
-	case CHIP_RENOIR:
-	case CHIP_ALDEBARAN:
-		if (adev->flags & AMD_IS_APU)
-			adev->family = AMDGPU_FAMILY_RV;
-		else
-			adev->family = AMDGPU_FAMILY_AI;
-
-		r = soc15_set_ip_blocks(adev);
-		if (r)
-			return r;
-		break;
-	case  CHIP_NAVI10:
-	case  CHIP_NAVI14:
-	case  CHIP_NAVI12:
-	case  CHIP_SIENNA_CICHLID:
-	case  CHIP_NAVY_FLOUNDER:
-	case  CHIP_DIMGREY_CAVEFISH:
-	case  CHIP_BEIGE_GOBY:
-	case CHIP_VANGOGH:
-	case CHIP_YELLOW_CARP:
-	case CHIP_CYAN_SKILLFISH:
-		if (adev->asic_type == CHIP_VANGOGH)
-			adev->family = AMDGPU_FAMILY_VGH;
-		else if (adev->asic_type == CHIP_YELLOW_CARP)
-			adev->family = AMDGPU_FAMILY_YC;
-		else
-			adev->family = AMDGPU_FAMILY_NV;
-
-		r = nv_set_ip_blocks(adev);
+	default:
+		r = amdgpu_discovery_set_ip_blocks(adev);
 		if (r)
 			return r;
 		break;
-	default:
-		/* FIXME: not supported yet */
-		return -EINVAL;
 	}
 
 	amdgpu_amdkfd_device_probe(adev);
@@ -2350,6 +2317,10 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 
 		/* need to do gmc hw init early so we can allocate gpu mem */
 		if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_GMC) {
+			/* Try to reserve bad pages early */
+			if (amdgpu_sriov_vf(adev))
+				amdgpu_virt_exchange_data(adev);
+
 			r = amdgpu_device_vram_scratch_init(adev);
 			if (r) {
 				DRM_ERROR("amdgpu_vram_scratch_init failed %d\n", r);
@@ -2381,7 +2352,7 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 	}
 
 	if (amdgpu_sriov_vf(adev))
-		amdgpu_virt_init_data_exchange(adev);
+		amdgpu_virt_exchange_data(adev);
 
 	r = amdgpu_ib_pool_init(adev);
 	if (r) {
@@ -2432,10 +2403,6 @@ static int amdgpu_device_ip_init(struct amdgpu_device *adev)
 	if (!adev->gmc.xgmi.pending_reset)
 		amdgpu_amdkfd_device_init(adev);
 
-	r = amdgpu_amdkfd_resume_iommu(adev);
-	if (r)
-		goto init_failed;
-
 	amdgpu_fru_get_product_info(adev);
 
 init_failed:
@@ -2652,11 +2619,10 @@ static int amdgpu_device_ip_late_init(struct amdgpu_device *adev)
 	if (r)
 		DRM_ERROR("enable mgpu fan boost failed (%d).\n", r);
 
-	/* For XGMI + passthrough configuration on arcturus, enable light SBR */
-	if (adev->asic_type == CHIP_ARCTURUS &&
-	    amdgpu_passthrough(adev) &&
-	    adev->gmc.xgmi.num_physical_nodes > 1)
-		smu_set_light_sbr(&adev->smu, true);
+	/* For passthrough configuration on arcturus and aldebaran, enable special handling SBR */
+	if (amdgpu_passthrough(adev) && ((adev->asic_type == CHIP_ARCTURUS && adev->gmc.xgmi.num_physical_nodes > 1)||
+			       adev->asic_type == CHIP_ALDEBARAN ))
+		smu_handle_passthrough_sbr(&adev->smu, true);
 
 	if (adev->gmc.xgmi.num_physical_nodes > 1) {
 		mutex_lock(&mgpu_info.mutex);
@@ -2695,6 +2661,36 @@ static int amdgpu_device_ip_late_init(struct amdgpu_device *adev)
 	return 0;
 }
 
+/**
+ * amdgpu_device_smu_fini_early - smu hw_fini wrapper
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * For ASICs need to disable SMC first
+ */
+static void amdgpu_device_smu_fini_early(struct amdgpu_device *adev)
+{
+	int i, r;
+
+	if (adev->ip_versions[GC_HWIP][0] > IP_VERSION(9, 0, 0))
+		return;
+
+	for (i = 0; i < adev->num_ip_blocks; i++) {
+		if (!adev->ip_blocks[i].status.hw)
+			continue;
+		if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {
+			r = adev->ip_blocks[i].version->funcs->hw_fini((void *)adev);
+			/* XXX handle errors */
+			if (r) {
+				DRM_DEBUG("hw_fini of IP block <%s> failed %d\n",
+					  adev->ip_blocks[i].version->funcs->name, r);
+			}
+			adev->ip_blocks[i].status.hw = false;
+			break;
+		}
+	}
+}
+
 static int amdgpu_device_ip_fini_early(struct amdgpu_device *adev)
 {
 	int i, r;
@@ -2715,21 +2711,8 @@ static int amdgpu_device_ip_fini_early(struct amdgpu_device *adev)
 	amdgpu_device_set_pg_state(adev, AMD_PG_STATE_UNGATE);
 	amdgpu_device_set_cg_state(adev, AMD_CG_STATE_UNGATE);
 
-	/* need to disable SMC first */
-	for (i = 0; i < adev->num_ip_blocks; i++) {
-		if (!adev->ip_blocks[i].status.hw)
-			continue;
-		if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {
-			r = adev->ip_blocks[i].version->funcs->hw_fini((void *)adev);
-			/* XXX handle errors */
-			if (r) {
-				DRM_DEBUG("hw_fini of IP block <%s> failed %d\n",
-					  adev->ip_blocks[i].version->funcs->name, r);
-			}
-			adev->ip_blocks[i].status.hw = false;
-			break;
-		}
-	}
+	/* Workaroud for ASICs need to disable SMC first */
+	amdgpu_device_smu_fini_early(adev);
 
 	for (i = adev->num_ip_blocks - 1; i >= 0; i--) {
 		if (!adev->ip_blocks[i].status.hw)
@@ -2745,6 +2728,11 @@ static int amdgpu_device_ip_fini_early(struct amdgpu_device *adev)
 		adev->ip_blocks[i].status.hw = false;
 	}
 
+	if (amdgpu_sriov_vf(adev)) {
+		if (amdgpu_virt_release_full_gpu(adev, false))
+			DRM_ERROR("failed to release exclusive mode on fini\n");
+	}
+
 	return 0;
 }
 
@@ -2766,8 +2754,6 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
 	if (amdgpu_sriov_vf(adev) && adev->virt.ras_init_done)
 		amdgpu_virt_release_ras_err_handler_data(adev);
 
-	amdgpu_ras_pre_fini(adev);
-
 	if (adev->gmc.xgmi.num_physical_nodes > 1)
 		amdgpu_xgmi_remove_device(adev);
 
@@ -2805,10 +2791,6 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
 
 	amdgpu_ras_fini(adev);
 
-	if (amdgpu_sriov_vf(adev))
-		if (amdgpu_virt_release_full_gpu(adev, false))
-			DRM_ERROR("failed to release exclusive mode on fini\n");
-
 	return 0;
 }
 
@@ -3203,12 +3185,28 @@ static void amdgpu_device_detect_sriov_bios(struct amdgpu_device *adev)
 bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 {
 	switch (asic_type) {
+#ifdef CONFIG_DRM_AMDGPU_SI
+	case CHIP_HAINAN:
+#endif
+	case CHIP_TOPAZ:
+		/* chips with no display hardware */
+		return false;
 #if defined(CONFIG_DRM_AMD_DC)
-#if defined(CONFIG_DRM_AMD_DC_SI)
 	case CHIP_TAHITI:
 	case CHIP_PITCAIRN:
 	case CHIP_VERDE:
 	case CHIP_OLAND:
+		/*
+		 * We have systems in the wild with these ASICs that require
+		 * LVDS and VGA support which is not supported with DC.
+		 *
+		 * Fallback to the non-DC driver here by default so as not to
+		 * cause regressions.
+		 */
+#if defined(CONFIG_DRM_AMD_DC_SI)
+		return amdgpu_dc > 0;
+#else
+		return false;
 #endif
 	case CHIP_BONAIRE:
 	case CHIP_KAVERI:
@@ -3240,6 +3238,7 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_NAVI14:
 	case CHIP_NAVI12:
 	case CHIP_RENOIR:
+	case CHIP_CYAN_SKILLFISH:
 	case CHIP_SIENNA_CICHLID:
 	case CHIP_NAVY_FLOUNDER:
 	case CHIP_DIMGREY_CAVEFISH:
@@ -3247,13 +3246,15 @@ bool amdgpu_device_asic_has_dc_support(enum amd_asic_type asic_type)
 	case CHIP_VANGOGH:
 	case CHIP_YELLOW_CARP:
 #endif
+	default:
 		return amdgpu_dc != 0;
-#endif
+#else
 	default:
 		if (amdgpu_dc > 0)
 			DRM_INFO_ONCE("Display Core has been requested via kernel parameter "
 					 "but isn't supported by ASIC, ignoring\n");
 		return false;
+#endif
 	}
 }
 
@@ -3354,6 +3355,8 @@ static int amdgpu_device_get_job_timeout_settings(struct amdgpu_device *adev)
 				continue;
 			} else if (timeout < 0) {
 				timeout = MAX_SCHEDULE_TIMEOUT;
+				dev_warn(adev->dev, "lockup timeout disabled");
+				add_taint(TAINT_SOFTLOCKUP, LOCKDEP_STILL_OK);
 			} else {
 				timeout = msecs_to_jiffies(timeout);
 			}
@@ -3389,6 +3392,22 @@ static int amdgpu_device_get_job_timeout_settings(struct amdgpu_device *adev)
 	return ret;
 }
 
+/**
+ * amdgpu_device_check_iommu_direct_map - check if RAM direct mapped to GPU
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * RAM direct mapped to GPU if IOMMU is not enabled or is pass through mode
+ */
+static void amdgpu_device_check_iommu_direct_map(struct amdgpu_device *adev)
+{
+	struct iommu_domain *domain;
+
+	domain = iommu_get_domain_for_dev(adev->dev);
+	if (!domain || domain->type == IOMMU_DOMAIN_IDENTITY)
+		adev->ram_is_direct_mapped = true;
+}
+
 static const struct attribute *amdgpu_dev_attributes[] = {
 	&dev_attr_product_name.attr,
 	&dev_attr_product_number.attr,
@@ -3531,6 +3550,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 		adev->rmmio_size = pci_resource_len(adev->pdev, 2);
 	}
 
+	for (i = 0; i < AMD_IP_BLOCK_TYPE_NUM; i++)
+		atomic_set(&adev->pm.pwr_state[i], POWER_STATE_UNKNOWN);
+
 	adev->rmmio = ioremap(adev->rmmio_base, adev->rmmio_size);
 	if (adev->rmmio == NULL) {
 		return -ENOMEM;
@@ -3538,17 +3560,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)adev->rmmio_base);
 	DRM_INFO("register mmio size: %u\n", (unsigned)adev->rmmio_size);
 
-	/* enable PCIE atomic ops */
-	r = pci_enable_atomic_ops_to_root(adev->pdev,
-					  PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
-					  PCI_EXP_DEVCAP2_ATOMIC_COMP64);
-	if (r) {
-		adev->have_atomics_support = false;
-		DRM_INFO("PCIE atomic ops is not supported\n");
-	} else {
-		adev->have_atomics_support = true;
-	}
-
 	amdgpu_device_get_pcie_info(adev);
 
 	if (amdgpu_mcbp)
@@ -3571,6 +3582,26 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	if (r)
 		return r;
 
+	/* Need to get xgmi info early to decide the reset behavior*/
+	if (adev->gmc.xgmi.supported) {
+		r = adev->gfxhub.funcs->get_xgmi_info(adev);
+		if (r)
+			return r;
+	}
+
+	/* enable PCIE atomic ops */
+	if (amdgpu_sriov_vf(adev))
+		adev->have_atomics_support = ((struct amd_sriov_msg_pf2vf_info *)
+			adev->virt.fw_reserve.p_pf2vf)->pcie_atomic_ops_enabled_flags ==
+			(PCI_EXP_DEVCAP2_ATOMIC_COMP32 | PCI_EXP_DEVCAP2_ATOMIC_COMP64);
+	else
+		adev->have_atomics_support =
+			!pci_enable_atomic_ops_to_root(adev->pdev,
+					  PCI_EXP_DEVCAP2_ATOMIC_COMP32 |
+					  PCI_EXP_DEVCAP2_ATOMIC_COMP64);
+	if (!adev->have_atomics_support)
+		dev_info(adev->dev, "PCIE atomic ops is not supported\n");
+
 	/* doorbell bar mapping and doorbell index init*/
 	amdgpu_device_doorbell_init(adev);
 
@@ -3704,8 +3735,6 @@ fence_driver_init:
 	/* Get a log2 for easy divisions. */
 	adev->mm_stats.log2_max_MBps = ilog2(max(1u, max_MBps));
 
-	amdgpu_fbdev_init(adev);
-
 	r = amdgpu_pm_sysfs_init(adev);
 	if (r) {
 		adev->pm_sysfs_en = false;
@@ -3789,6 +3818,8 @@ fence_driver_init:
 		queue_delayed_work(system_wq, &mgpu_info.delayed_reset_work,
 				   msecs_to_jiffies(AMDGPU_RESUME_MS));
 
+	amdgpu_device_check_iommu_direct_map(adev);
+
 	return 0;
 
 release_ras_con:
@@ -3822,7 +3853,7 @@ static void amdgpu_device_unmap_mmio(struct amdgpu_device *adev)
 }
 
 /**
- * amdgpu_device_fini - tear down the driver
+ * amdgpu_device_fini_hw - tear down the driver
  *
  * @adev: amdgpu_device pointer
  *
@@ -3850,7 +3881,7 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 	/* disable all interrupts */
 	amdgpu_irq_disable_all(adev);
 	if (adev->mode_info.mode_config_initialized){
-		if (!amdgpu_device_has_dc_support(adev))
+		if (!drm_drv_uses_atomic_modeset(adev_to_drm(adev)))
 			drm_helper_force_disable_all(adev_to_drm(adev));
 		else
 			drm_atomic_helper_shutdown(adev_to_drm(adev));
@@ -3863,21 +3894,27 @@ void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 		amdgpu_ucode_sysfs_fini(adev);
 	sysfs_remove_files(&adev->dev->kobj, amdgpu_dev_attributes);
 
-	amdgpu_fbdev_fini(adev);
+	/* disable ras feature must before hw fini */
+	amdgpu_ras_pre_fini(adev);
+
+	amdgpu_device_ip_fini_early(adev);
 
 	amdgpu_irq_fini_hw(adev);
 
-	amdgpu_device_ip_fini_early(adev);
+	if (adev->mman.initialized)
+		ttm_device_clear_dma_mappings(&adev->mman.bdev);
 
 	amdgpu_gart_dummy_page_fini(adev);
 
-	amdgpu_device_unmap_mmio(adev);
+	if (drm_dev_is_unplugged(adev_to_drm(adev)))
+		amdgpu_device_unmap_mmio(adev);
+
 }
 
 void amdgpu_device_fini_sw(struct amdgpu_device *adev)
 {
-	amdgpu_device_ip_fini(adev);
 	amdgpu_fence_driver_sw_fini(adev);
+	amdgpu_device_ip_fini(adev);
 	release_firmware(adev->firmware.gpu_info_fw);
 	adev->firmware.gpu_info_fw = NULL;
 	adev->accel_working = false;
@@ -3909,6 +3946,25 @@ void amdgpu_device_fini_sw(struct amdgpu_device *adev)
 
 }
 
+/**
+ * amdgpu_device_evict_resources - evict device resources
+ * @adev: amdgpu device object
+ *
+ * Evicts all ttm device resources(vram BOs, gart table) from the lru list
+ * of the vram memory type. Mainly used for evicting device resources
+ * at suspend time.
+ *
+ */
+static void amdgpu_device_evict_resources(struct amdgpu_device *adev)
+{
+	/* No need to evict vram on APUs for suspend to ram */
+	if (adev->in_s3 && (adev->flags & AMD_IS_APU))
+		return;
+
+	if (amdgpu_ttm_evict_resources(adev, TTM_PL_VRAM))
+		DRM_WARN("evicting device resources failed\n");
+
+}
 
 /*
  * Suspend & resume.
@@ -3938,7 +3994,7 @@ int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
 	drm_kms_helper_poll_disable(dev);
 
 	if (fbcon)
-		amdgpu_fbdev_set_suspend(adev, 1);
+		drm_fb_helper_set_suspend_unlocked(adev_to_drm(adev)->fb_helper, true);
 
 	cancel_delayed_work_sync(&adev->delayed_init_work);
 
@@ -3949,17 +4005,16 @@ int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
 	if (!adev->in_s0ix)
 		amdgpu_amdkfd_suspend(adev, adev->in_runpm);
 
-	/* evict vram memory */
-	amdgpu_bo_evict_vram(adev);
+	/* First evict vram memory */
+	amdgpu_device_evict_resources(adev);
 
 	amdgpu_fence_driver_hw_fini(adev);
 
 	amdgpu_device_ip_suspend_phase2(adev);
-	/* evict remaining vram memory
-	 * This second call to evict vram is to evict the gart page table
-	 * using the CPU.
+	/* This second call to evict device resources is to evict
+	 * the gart page table using the CPU.
 	 */
-	amdgpu_bo_evict_vram(adev);
+	amdgpu_device_evict_resources(adev);
 
 	return 0;
 }
@@ -4016,7 +4071,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool fbcon)
 	flush_delayed_work(&adev->delayed_init_work);
 
 	if (fbcon)
-		amdgpu_fbdev_set_suspend(adev, 0);
+		drm_fb_helper_set_suspend_unlocked(adev_to_drm(adev)->fb_helper, false);
 
 	drm_kms_helper_poll_enable(dev);
 
@@ -4285,6 +4340,11 @@ static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
 				     bool from_hypervisor)
 {
 	int r;
+	struct amdgpu_hive_info *hive = NULL;
+
+	amdgpu_amdkfd_pre_reset(adev);
+
+	amdgpu_amdkfd_pre_reset(adev);
 
 	if (from_hypervisor)
 		r = amdgpu_virt_request_full_gpu(adev, true);
@@ -4293,8 +4353,6 @@ static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
 	if (r)
 		return r;
 
-	amdgpu_amdkfd_pre_reset(adev);
-
 	/* Resume IP prior to SMC */
 	r = amdgpu_device_ip_reinit_early_sriov(adev);
 	if (r)
@@ -4313,9 +4371,19 @@ static int amdgpu_device_reset_sriov(struct amdgpu_device *adev,
 	if (r)
 		goto error;
 
-	amdgpu_irq_gpu_reset_resume_helper(adev);
-	r = amdgpu_ib_ring_tests(adev);
-	amdgpu_amdkfd_post_reset(adev);
+	hive = amdgpu_get_xgmi_hive(adev);
+	/* Update PSP FW topology after reset */
+	if (hive && adev->gmc.xgmi.num_physical_nodes > 1)
+		r = amdgpu_xgmi_update_topology(hive, adev);
+
+	if (hive)
+		amdgpu_put_xgmi_hive(hive);
+
+	if (!r) {
+		amdgpu_irq_gpu_reset_resume_helper(adev);
+		r = amdgpu_ib_ring_tests(adev);
+		amdgpu_amdkfd_post_reset(adev);
+	}
 
 error:
 	if (!r && adev->virt.gim_feature & AMDGIM_FEATURE_GIM_FLR_VRAMLOST) {
@@ -4458,7 +4526,7 @@ int amdgpu_device_mode1_reset(struct amdgpu_device *adev)
 int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
 				 struct amdgpu_reset_context *reset_context)
 {
-	int i, j, r = 0;
+	int i, r = 0;
 	struct amdgpu_job *job = NULL;
 	bool need_full_reset =
 		test_bit(AMDGPU_NEED_FULL_RESET, &reset_context->flags);
@@ -4466,10 +4534,6 @@ int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
 	if (reset_context->reset_req_dev == adev)
 		job = reset_context->job;
 
-	/* 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 */
 		amdgpu_virt_fini_data_exchange(adev);
@@ -4484,15 +4548,8 @@ int amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
 
 		/*clear job fence from fence drv to avoid force_completion
 		 *leave NULL and vm flush fence in fence drv */
-		for (j = 0; j <= ring->fence_drv.num_fences_mask; j++) {
-			struct dma_fence *old, **ptr;
+		amdgpu_fence_driver_clear_job_fences(ring);
 
-			ptr = &ring->fence_drv.fences[j];
-			old = rcu_dereference_protected(*ptr, 1);
-			if (old && test_bit(AMDGPU_FENCE_FLAG_EMBED_IN_JOB_BIT, &old->flags)) {
-				RCU_INIT_POINTER(*ptr, NULL);
-			}
-		}
 		/* after all hw jobs are reset, hw fence is meaningless, so force_completion */
 		amdgpu_fence_driver_force_completion(ring);
 	}
@@ -4652,7 +4709,7 @@ int amdgpu_do_asic_reset(struct list_head *device_list_handle,
 				if (r)
 					goto out;
 
-				amdgpu_fbdev_set_suspend(tmp_adev, 0);
+				drm_fb_helper_set_suspend_unlocked(adev_to_drm(tmp_adev)->fb_helper, false);
 
 				/*
 				 * The GPU enters bad state once faulty pages
@@ -4751,7 +4808,7 @@ static int amdgpu_device_lock_hive_adev(struct amdgpu_device *adev, struct amdgp
 {
 	struct amdgpu_device *tmp_adev = NULL;
 
-	if (adev->gmc.xgmi.num_physical_nodes > 1) {
+	if (!amdgpu_sriov_vf(adev) && (adev->gmc.xgmi.num_physical_nodes > 1)) {
 		if (!hive) {
 			dev_err(adev->dev, "Hive is NULL while device has multiple xgmi nodes");
 			return -ENODEV;
@@ -4860,6 +4917,9 @@ static void amdgpu_device_recheck_guilty_jobs(
 
 		/* clear job's guilty and depend the folowing step to decide the real one */
 		drm_sched_reset_karma(s_job);
+		/* for the real bad job, it will be resubmitted twice, adding a dma_fence_get
+		 * to make sure fence is balanced */
+		dma_fence_get(s_job->s_fence->parent);
 		drm_sched_resubmit_jobs_ext(&ring->sched, 1);
 
 		ret = dma_fence_wait_timeout(s_job->s_fence->parent, false, ring->sched.timeout);
@@ -4895,6 +4955,7 @@ retry:
 
 		/* got the hw fence, signal finished fence */
 		atomic_dec(ring->sched.score);
+		dma_fence_put(s_job->s_fence->parent);
 		dma_fence_get(&s_job->s_fence->finished);
 		dma_fence_signal(&s_job->s_fence->finished);
 		dma_fence_put(&s_job->s_fence->finished);
@@ -4959,7 +5020,8 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
 	 * We always reset all schedulers for device and all devices for XGMI
 	 * hive so that should take care of them too.
 	 */
-	hive = amdgpu_get_xgmi_hive(adev);
+	if (!amdgpu_sriov_vf(adev))
+		hive = amdgpu_get_xgmi_hive(adev);
 	if (hive) {
 		if (atomic_cmpxchg(&hive->in_reset, 0, 1) != 0) {
 			DRM_INFO("Bailing on TDR for s_job:%llx, hive: %llx as another already in progress",
@@ -5000,7 +5062,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
 	 * to put adev in the 1st position.
 	 */
 	INIT_LIST_HEAD(&device_list);
-	if (adev->gmc.xgmi.num_physical_nodes > 1) {
+	if (!amdgpu_sriov_vf(adev) && (adev->gmc.xgmi.num_physical_nodes > 1)) {
 		list_for_each_entry(tmp_adev, &hive->device_list, gmc.xgmi.head)
 			list_add_tail(&tmp_adev->reset_list, &device_list);
 		if (!list_is_first(&adev->reset_list, &device_list))
@@ -5039,7 +5101,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
 		 */
 		amdgpu_unregister_gpu_instance(tmp_adev);
 
-		amdgpu_fbdev_set_suspend(tmp_adev, 1);
+		drm_fb_helper_set_suspend_unlocked(adev_to_drm(adev)->fb_helper, true);
 
 		/* disable ras on ALL IPs */
 		if (!need_emergency_restart &&
@@ -5089,7 +5151,7 @@ retry:	/* Rest of adevs pre asic reset from XGMI hive. */
 
 	tmp_vram_lost_counter = atomic_read(&((adev)->vram_lost_counter));
 	/* Actual ASIC resets if needed.*/
-	/* TODO Implement XGMI hive reset logic for SRIOV */
+	/* Host driver will handle XGMI hive reset for SRIOV */
 	if (amdgpu_sriov_vf(adev)) {
 		r = amdgpu_device_reset_sriov(adev, job ? false : true);
 		if (r)
@@ -5130,7 +5192,7 @@ skip_hw_reset:
 			drm_sched_start(&ring->sched, !tmp_adev->asic_reset_res);
 		}
 
-		if (!amdgpu_device_has_dc_support(tmp_adev) && !job_signaled) {
+		if (!drm_drv_uses_atomic_modeset(adev_to_drm(tmp_adev)) && !job_signaled) {
 			drm_helper_resume_force_mode(adev_to_drm(tmp_adev));
 		}
 
@@ -5151,7 +5213,7 @@ skip_sched_resume:
 	list_for_each_entry(tmp_adev, device_list_handle, reset_list) {
 		/* unlock kfd: SRIOV would do it separately */
 		if (!need_emergency_restart && !amdgpu_sriov_vf(tmp_adev))
-	                amdgpu_amdkfd_post_reset(tmp_adev);
+			amdgpu_amdkfd_post_reset(tmp_adev);
 
 		/* kfd_post_reset will do nothing if kfd device is not initialized,
 		 * need to bring up kfd here if it's not be initialized before
@@ -5634,3 +5696,42 @@ void amdgpu_device_invalidate_hdp(struct amdgpu_device *adev,
 
 	amdgpu_asic_invalidate_hdp(adev, ring);
 }
+
+/**
+ * amdgpu_device_halt() - bring hardware to some kind of halt state
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Bring hardware to some kind of halt state so that no one can touch it
+ * any more. It will help to maintain error context when error occurred.
+ * Compare to a simple hang, the system will keep stable at least for SSH
+ * access. Then it should be trivial to inspect the hardware state and
+ * see what's going on. Implemented as following:
+ *
+ * 1. drm_dev_unplug() makes device inaccessible to user space(IOCTLs, etc),
+ *    clears all CPU mappings to device, disallows remappings through page faults
+ * 2. amdgpu_irq_disable_all() disables all interrupts
+ * 3. amdgpu_fence_driver_hw_fini() signals all HW fences
+ * 4. set adev->no_hw_access to avoid potential crashes after setp 5
+ * 5. amdgpu_device_unmap_mmio() clears all MMIO mappings
+ * 6. pci_disable_device() and pci_wait_for_pending_transaction()
+ *    flush any in flight DMA operations
+ */
+void amdgpu_device_halt(struct amdgpu_device *adev)
+{
+	struct pci_dev *pdev = adev->pdev;
+	struct drm_device *ddev = adev_to_drm(adev);
+
+	drm_dev_unplug(ddev);
+
+	amdgpu_irq_disable_all(adev);
+
+	amdgpu_fence_driver_hw_fini(adev);
+
+	adev->no_hw_access = true;
+
+	amdgpu_device_unmap_mmio(adev);
+
+	pci_disable_device(pdev);
+	pci_wait_for_pending_transaction(pdev);
+}