[PATCH v2 4/8] drm/amdgpu: Split amdgpu_device_fini into early and late

[Andrey Grodzovsky <andrey.grodzovsky@amd.com>]

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.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  6 +++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 15 +++++++++++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  6 ++----
 drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c    | 24 +++++++++++++++---------
 drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h    |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c    | 23 +++++++++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c    |  3 +++
 7 files changed, 54 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 2a806cb..604a681 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1003,7 +1003,9 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 		       struct drm_device *ddev,
 		       struct pci_dev *pdev,
 		       uint32_t flags);
-void amdgpu_device_fini(struct amdgpu_device *adev);
+void amdgpu_device_fini_early(struct amdgpu_device *adev);
+void amdgpu_device_fini_late(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,
@@ -1188,6 +1190,8 @@ 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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index cc41e8f..e7b9065 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2309,6 +2309,8 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
 {
 	int i, r;
 
+	//DRM_ERROR("adev 0x%llx", (long long unsigned int)adev);
+
 	amdgpu_ras_pre_fini(adev);
 
 	if (adev->gmc.xgmi.num_physical_nodes > 1)
@@ -3304,10 +3306,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
  * Tear down the driver info (all asics).
  * Called at driver shutdown.
  */
-void amdgpu_device_fini(struct amdgpu_device *adev)
+void amdgpu_device_fini_early(struct amdgpu_device *adev)
 {
-	int r;
-
 	DRM_INFO("amdgpu: finishing device.\n");
 	flush_delayed_work(&adev->delayed_init_work);
 	adev->shutdown = true;
@@ -3330,7 +3330,13 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 	if (adev->pm_sysfs_en)
 		amdgpu_pm_sysfs_fini(adev);
 	amdgpu_fbdev_fini(adev);
-	r = amdgpu_device_ip_fini(adev);
+
+	amdgpu_irq_fini_early(adev);
+}
+
+void amdgpu_device_fini_late(struct amdgpu_device *adev)
+{
+	amdgpu_device_ip_fini(adev);
 	if (adev->firmware.gpu_info_fw) {
 		release_firmware(adev->firmware.gpu_info_fw);
 		adev->firmware.gpu_info_fw = NULL;
@@ -3368,6 +3374,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev)
 		amdgpu_pmu_fini(adev);
 	if (amdgpu_discovery && adev->asic_type >= CHIP_NAVI10)
 		amdgpu_discovery_fini(adev);
+
 }
 
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 9e5afa5..43592dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1134,12 +1134,9 @@ 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);
 	drm_dev_put(dev);
@@ -1445,6 +1442,7 @@ static struct drm_driver 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,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 0cc4c67..1697655 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/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"
@@ -297,6 +298,20 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
 	return 0;
 }
 
+
+void amdgpu_irq_fini_early(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
  *
@@ -310,15 +325,6 @@ void amdgpu_irq_fini(struct amdgpu_device *adev)
 {
 	unsigned i, j;
 
-	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);
-	}
-
 	for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) {
 		if (!adev->irq.client[i].sources)
 			continue;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h
index c718e94..718c70f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h
@@ -104,6 +104,7 @@ 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_early(struct amdgpu_device *adev);
 int amdgpu_irq_add_id(struct amdgpu_device *adev,
 		      unsigned client_id, unsigned src_id,
 		      struct amdgpu_irq_src *source);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index c0b1904..9d0af22 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -29,6 +29,7 @@
 #include "amdgpu.h"
 #include <drm/drm_debugfs.h>
 #include <drm/amdgpu_drm.h>
+#include <drm/drm_drv.h>
 #include "amdgpu_sched.h"
 #include "amdgpu_uvd.h"
 #include "amdgpu_vce.h"
@@ -86,7 +87,7 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
 	amdgpu_unregister_gpu_instance(adev);
 
 	if (adev->rmmio == NULL)
-		goto done_free;
+		return;
 
 	if (adev->runpm) {
 		pm_runtime_get_sync(dev->dev);
@@ -95,11 +96,7 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
 
 	amdgpu_acpi_fini(adev);
 
-	amdgpu_device_fini(adev);
-
-done_free:
-	kfree(adev);
-	dev->dev_private = NULL;
+	amdgpu_device_fini_early(adev);
 }
 
 void amdgpu_register_gpu_instance(struct amdgpu_device *adev)
@@ -1108,6 +1105,20 @@ 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 = dev->dev_private;
+
+	amdgpu_device_fini_late(adev);
+
+	kfree(adev);
+	dev->dev_private = NULL;
+
+	drm_dev_fini(dev);
+	kfree(dev);
+}
+
 /*
  * VBlank related functions.
  */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 7348619..169c2239 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2056,9 +2056,12 @@ int amdgpu_ras_pre_fini(struct amdgpu_device *adev)
 {
 	struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
 
+	//DRM_ERROR("adev 0x%llx", (long long unsigned int)adev);
+
 	if (!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);
-- 
2.7.4

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