Re: [PATCH v5 03/27] drm/amdgpu: Split amdgpu_device_fini into early and late

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Am 28.04.21 um 17:11 schrieb Andrey Grodzovsky:
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@xxxxxxx>

Acked-by: Christian König <christian.koenig@xxxxxxx>

But Alex should acknowledge this as well since it is general driver design.

Christian.

---
  drivers/gpu/drm/amd/amdgpu/amdgpu.h        |  6 ++++-
  drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 26 +++++++++++++++-------
  drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c    |  7 ++----
  drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c  | 15 ++++++++++++-
  drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c    | 26 +++++++++++++---------
  drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h    |  3 ++-
  drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c    | 12 +++++++++-
  drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c    |  1 +
  drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h   |  3 ++-
  drivers/gpu/drm/amd/amdgpu/cik_ih.c        |  2 +-
  drivers/gpu/drm/amd/amdgpu/cz_ih.c         |  2 +-
  drivers/gpu/drm/amd/amdgpu/iceland_ih.c    |  2 +-
  drivers/gpu/drm/amd/amdgpu/navi10_ih.c     |  2 +-
  drivers/gpu/drm/amd/amdgpu/si_ih.c         |  2 +-
  drivers/gpu/drm/amd/amdgpu/tonga_ih.c      |  2 +-
  drivers/gpu/drm/amd/amdgpu/vega10_ih.c     |  2 +-
  drivers/gpu/drm/amd/amdgpu/vega20_ih.c     |  2 +-
  17 files changed, 79 insertions(+), 36 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 1af2fa1591fd..fddb82897e5d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1073,7 +1073,9 @@ 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,
@@ -1289,6 +1291,8 @@ 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 6447cd6ca5a8..8d22b79fc1cd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -3590,14 +3590,12 @@ 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_hw(struct amdgpu_device *adev)
  {
  	dev_info(adev->dev, "amdgpu: finishing device.\n");
  	flush_delayed_work(&adev->delayed_init_work);
  	adev->shutdown = true;
- kfree(adev->pci_state);
-
  	/* make sure IB test finished before entering exclusive mode
  	 * to avoid preemption on IB test
  	 * */
@@ -3614,11 +3612,24 @@ 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;
@@ -3647,14 +3658,13 @@ 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);
+
  }
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 671ec1002230..54cb5ee2f563 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1249,14 +1249,10 @@ 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
@@ -1587,6 +1583,7 @@ 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,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 8e0a5650d383..34d51e962799 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/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;
@@ -544,6 +544,19 @@ void amdgpu_fence_driver_fini(struct amdgpu_device *adev)
  		if (!ring->no_scheduler)
  			drm_sched_fini(&ring->sched);
  		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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index afbbec82a289..63e815c27585 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"
@@ -313,6 +314,20 @@ 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
   *
@@ -322,19 +337,10 @@ 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;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h
index ac527e5deae6..392a7324e2b1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.h
@@ -104,7 +104,8 @@ 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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 64beb3399604..1af3fba7bfd4 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_uvd.h"
  #include "amdgpu_vce.h"
  #include "atom.h"
@@ -93,7 +94,7 @@ 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)
@@ -1151,6 +1152,15 @@ 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.
   */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index 1fb2a91ad30a..c0a16eac4923 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -2142,6 +2142,7 @@ int amdgpu_ras_pre_fini(struct amdgpu_device *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);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
index 56acec1075ac..0f195f7bf797 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.h
+++ b/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,
diff --git a/drivers/gpu/drm/amd/amdgpu/cik_ih.c b/drivers/gpu/drm/amd/amdgpu/cik_ih.c
index d3745711d55f..183d44a6583c 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik_ih.c
+++ b/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);
diff --git a/drivers/gpu/drm/amd/amdgpu/cz_ih.c b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
index 307c01301c87..d32743949003 100644
--- a/drivers/gpu/drm/amd/amdgpu/cz_ih.c
+++ b/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);
diff --git a/drivers/gpu/drm/amd/amdgpu/iceland_ih.c b/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
index cc957471f31e..da96c6013477 100644
--- a/drivers/gpu/drm/amd/amdgpu/iceland_ih.c
+++ b/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);
diff --git a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c b/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
index f4e4040bbd25..5eea4550b856 100644
--- a/drivers/gpu/drm/amd/amdgpu/navi10_ih.c
+++ b/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);
diff --git a/drivers/gpu/drm/amd/amdgpu/si_ih.c b/drivers/gpu/drm/amd/amdgpu/si_ih.c
index 51880f6ef634..751307f3252c 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_ih.c
+++ b/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;
diff --git a/drivers/gpu/drm/amd/amdgpu/tonga_ih.c b/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
index 249fcbee7871..973d80ec7f6c 100644
--- a/drivers/gpu/drm/amd/amdgpu/tonga_ih.c
+++ b/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);
diff --git a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
index 88626d83e07b..2d0094c276ca 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega10_ih.c
@@ -523,7 +523,7 @@ 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);
diff --git a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
index 5a3c867d5881..9059b21b079f 100644
--- a/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
+++ b/drivers/gpu/drm/amd/amdgpu/vega20_ih.c
@@ -558,7 +558,7 @@ 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);




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