drm/amdgpu: Split amdgpu_device_fini into early and late

Some of the stuff in amdgpu_device_fini such as HW interrupts
disable and pending fences finilization must be done right away on
pci_remove while most of the stuff which relates to finilizing and
releasing driver data structures can be kept until
drm_driver.release hook is called, i.e. when the last device
reference is dropped.

v4: Change functions prefix early->hw and late->sw

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210512142648.666476-3-andrey.grodzovsky@amd.com

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

@@ -1099,7 +1099,9 @@ static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_device *bdev)
 
 int amdgpu_device_init(struct amdgpu_device *adev,
 		       uint32_t flags);
-void amdgpu_device_fini(struct amdgpu_device *adev);
+void amdgpu_device_fini_hw(struct amdgpu_device *adev);
+void amdgpu_device_fini_sw(struct amdgpu_device *adev);
+
 int amdgpu_gpu_wait_for_idle(struct amdgpu_device *adev);
 
 void amdgpu_device_vram_access(struct amdgpu_device *adev, loff_t pos,
@@ -1319,6 +1321,8 @@ void amdgpu_driver_lastclose_kms(struct drm_device *dev);
 int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv);
 void amdgpu_driver_postclose_kms(struct drm_device *dev,
 				 struct drm_file *file_priv);
+void amdgpu_driver_release_kms(struct drm_device *dev);
+
 int amdgpu_device_ip_suspend(struct amdgpu_device *adev);
 int amdgpu_device_suspend(struct drm_device *dev, bool fbcon);
 int amdgpu_device_resume(struct drm_device *dev, bool fbcon);

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

@@ -3646,15 +3646,13 @@ failed_unmap:
  * Tear down the driver info (all asics).
  * Called at driver shutdown.
  */
-void amdgpu_device_fini(struct amdgpu_device *adev)
+void amdgpu_device_fini_hw(struct amdgpu_device *adev)
 {
 	dev_info(adev->dev, "amdgpu: finishing device.\n");
 	flush_delayed_work(&adev->delayed_init_work);
 	ttm_bo_lock_delayed_workqueue(&adev->mman.bdev);
 	adev->shutdown = true;
 
-	kfree(adev->pci_state);
-
 	/* make sure IB test finished before entering exclusive mode
 	 * to avoid preemption on IB test
 	 * */
@@ -3671,11 +3669,24 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 		else
 			drm_atomic_helper_shutdown(adev_to_drm(adev));
 	}
-	amdgpu_fence_driver_fini(adev);
+	amdgpu_fence_driver_fini_hw(adev);
+
 	if (adev->pm_sysfs_en)
 		amdgpu_pm_sysfs_fini(adev);
+	if (adev->ucode_sysfs_en)
+		amdgpu_ucode_sysfs_fini(adev);
+	sysfs_remove_files(&adev->dev->kobj, amdgpu_dev_attributes);
+
+
 	amdgpu_fbdev_fini(adev);
+
+	amdgpu_irq_fini_hw(adev);
+}
+
+void amdgpu_device_fini_sw(struct amdgpu_device *adev)
+{
 	amdgpu_device_ip_fini(adev);
+	amdgpu_fence_driver_fini_sw(adev);
 	release_firmware(adev->firmware.gpu_info_fw);
 	adev->firmware.gpu_info_fw = NULL;
 	adev->accel_working = false;
@@ -3701,14 +3712,13 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 	adev->rmmio = NULL;
 	amdgpu_device_doorbell_fini(adev);
 
-	if (adev->ucode_sysfs_en)
-		amdgpu_ucode_sysfs_fini(adev);
-
-	sysfs_remove_files(&adev->dev->kobj, amdgpu_dev_attributes);
 	if (IS_ENABLED(CONFIG_PERF_EVENTS))
 		amdgpu_pmu_fini(adev);
 	if (adev->mman.discovery_bin)
 		amdgpu_discovery_fini(adev);
+
+	kfree(adev->pci_state);
+
 }
 
 

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

@@ -1311,14 +1311,10 @@ amdgpu_pci_remove(struct pci_dev *pdev)
 {
 	struct drm_device *dev = pci_get_drvdata(pdev);
 
-#ifdef MODULE
-	if (THIS_MODULE->state != MODULE_STATE_GOING)
-#endif
-		DRM_ERROR("Hotplug removal is not supported\n");
 	drm_dev_unplug(dev);
 	amdgpu_driver_unload_kms(dev);
+
 	pci_disable_device(pdev);
-	pci_set_drvdata(pdev, NULL);
 }
 
 static void
@@ -1751,6 +1747,7 @@ static const struct drm_driver amdgpu_kms_driver = {
 	.dumb_create = amdgpu_mode_dumb_create,
 	.dumb_map_offset = amdgpu_mode_dumb_mmap,
 	.fops = &amdgpu_driver_kms_fops,
+	.release = &amdgpu_driver_release_kms,
 
 	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
 	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,

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

@@ -523,7 +523,7 @@ int amdgpu_fence_driver_init(struct amdgpu_device *adev)
  *
  * Tear down the fence driver for all possible rings (all asics).
  */
-void amdgpu_fence_driver_fini(struct amdgpu_device *adev)
+void amdgpu_fence_driver_fini_hw(struct amdgpu_device *adev)
 {
 	unsigned i, j;
 	int r;
@@ -545,6 +545,19 @@ void amdgpu_fence_driver_fini(struct amdgpu_device *adev)
 				       ring->fence_drv.irq_type);
 
 		del_timer_sync(&ring->fence_drv.fallback_timer);
+	}
+}
+
+void amdgpu_fence_driver_fini_sw(struct amdgpu_device *adev)
+{
+	unsigned int i, j;
+
+	for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
+		struct amdgpu_ring *ring = adev->rings[i];
+
+		if (!ring || !ring->fence_drv.initialized)
+			continue;
+
 		for (j = 0; j <= ring->fence_drv.num_fences_mask; ++j)
 			dma_fence_put(ring->fence_drv.fences[j]);
 		kfree(ring->fence_drv.fences);

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

@@ -49,6 +49,7 @@
 #include <drm/drm_irq.h>
 #include <drm/drm_vblank.h>
 #include <drm/amdgpu_drm.h>
+#include <drm/drm_drv.h>
 #include "amdgpu.h"
 #include "amdgpu_ih.h"
 #include "atom.h"
@@ -348,6 +349,20 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 	return 0;
 }
 
+
+void amdgpu_irq_fini_hw(struct amdgpu_device *adev)
+{
+	if (adev->irq.installed) {
+		drm_irq_uninstall(&adev->ddev);
+		adev->irq.installed = false;
+		if (adev->irq.msi_enabled)
+			pci_free_irq_vectors(adev->pdev);
+
+		if (!amdgpu_device_has_dc_support(adev))
+			flush_work(&adev->hotplug_work);
+	}
+}
+
 /**
  * amdgpu_irq_fini - shut down interrupt handling
  *
@@ -357,19 +372,10 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
  * functionality, shuts down vblank, hotplug and reset interrupt handling,
  * turns off interrupts from all sources (all ASICs).
  */
-void amdgpu_irq_fini(struct amdgpu_device *adev)
+void amdgpu_irq_fini_sw(struct amdgpu_device *adev)
 {
 	unsigned i, j;
 
-	if (adev->irq.installed) {
-		drm_irq_uninstall(adev_to_drm(adev));
-		adev->irq.installed = false;
-		if (adev->irq.msi_enabled)
-			pci_free_irq_vectors(adev->pdev);
-		if (!amdgpu_device_has_dc_support(adev))
-			flush_work(&adev->hotplug_work);
-	}
-
 	for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) {
 		if (!adev->irq.client[i].sources)
 			continue;

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

@@ -103,7 +103,8 @@ void amdgpu_irq_disable_all(struct amdgpu_device *adev);
 irqreturn_t amdgpu_irq_handler(int irq, void *arg);
 
 int amdgpu_irq_init(struct amdgpu_device *adev);
-void amdgpu_irq_fini(struct amdgpu_device *adev);
+void amdgpu_irq_fini_sw(struct amdgpu_device *adev);
+void amdgpu_irq_fini_hw(struct amdgpu_device *adev);
 int amdgpu_irq_add_id(struct amdgpu_device *adev,
 		      unsigned client_id, unsigned src_id,
 		      struct amdgpu_irq_src *source);

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

@@ -28,6 +28,7 @@
 
 #include "amdgpu.h"
 #include <drm/amdgpu_drm.h>
+#include <drm/drm_drv.h>
 #include "amdgpu_uvd.h"
 #include "amdgpu_vce.h"
 #include "atom.h"
@@ -92,7 +93,7 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
 	}
 
 	amdgpu_acpi_fini(adev);
-	amdgpu_device_fini(adev);
+	amdgpu_device_fini_hw(adev);
 }
 
 void amdgpu_register_gpu_instance(struct amdgpu_device *adev)
@@ -1219,6 +1220,15 @@ void amdgpu_driver_postclose_kms(struct drm_device *dev,
 	pm_runtime_put_autosuspend(dev->dev);
 }
 
+
+void amdgpu_driver_release_kms(struct drm_device *dev)
+{
+	struct amdgpu_device *adev = drm_to_adev(dev);
+
+	amdgpu_device_fini_sw(adev);
+	pci_set_drvdata(adev->pdev, NULL);
+}
+
 /*
  * VBlank related functions.
  */

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

@@ -2331,6 +2331,7 @@ int amdgpu_ras_pre_fini(struct amdgpu_device *adev)
 	if (!adev->ras_features || !con)
 		return 0;
 
+
 	/* Need disable ras on all IPs here before ip [hw/sw]fini */
 	amdgpu_ras_disable_all_features(adev, 0);
 	amdgpu_ras_recovery_fini(adev);

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

@@ -107,7 +107,8 @@ struct amdgpu_fence_driver {
 };
 
 int amdgpu_fence_driver_init(struct amdgpu_device *adev);
-void amdgpu_fence_driver_fini(struct amdgpu_device *adev);
+void amdgpu_fence_driver_fini_hw(struct amdgpu_device *adev);
+void amdgpu_fence_driver_fini_sw(struct amdgpu_device *adev);
 void amdgpu_fence_driver_force_completion(struct amdgpu_ring *ring);
 
 int amdgpu_fence_driver_init_ring(struct amdgpu_ring *ring,

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

@@ -309,7 +309,7 @@ static int cik_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 	amdgpu_irq_remove_domain(adev);
 

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

@@ -301,7 +301,7 @@ static int cz_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 	amdgpu_irq_remove_domain(adev);
 

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

@@ -300,7 +300,7 @@ static int iceland_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 	amdgpu_irq_remove_domain(adev);
 

drivers/gpu/drm/amd/amdgpu/navi10_ih.c

@@ -569,7 +569,7 @@ static int navi10_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih1);

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

@@ -175,7 +175,7 @@ static int si_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 
 	return 0;

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

@@ -312,7 +312,7 @@ static int tonga_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 	amdgpu_irq_remove_domain(adev);
 

drivers/gpu/drm/amd/amdgpu/vega10_ih.c

@@ -513,7 +513,7 @@ static int vega10_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih1);

drivers/gpu/drm/amd/amdgpu/vega20_ih.c

@@ -565,7 +565,7 @@ static int vega20_ih_sw_fini(void *handle)
 {
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
-	amdgpu_irq_fini(adev);
+	amdgpu_irq_fini_sw(adev);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
 	amdgpu_ih_ring_fini(adev, &adev->irq.ih1);