[PATCH v2 4/8] drm/amdgpu: Split amdgpu_device_fini into early and late
Daniel Vetter
daniel at ffwll.ch
Thu Nov 12 09:29:33 UTC 2020
On Wed, Nov 11, 2020 at 11:19:04PM -0500, Andrey Grodzovsky wrote:
>
> On 6/22/20 5:48 AM, Daniel Vetter wrote:
> > On Sun, Jun 21, 2020 at 02:03:04AM -0400, Andrey Grodzovsky wrote:
> > > 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 at amd.com>
> > Long term I think best if as much of this code is converted over to devm
> > (for hw stuff) and drmm (for sw stuff and allocations). Doing this all
> > manually is very error prone.
> >
> > I've started various such patches and others followed, but thus far only
> > very simple drivers tackled. But it should be doable step by step at
> > least, so you should have incremental benefits in code complexity right
> > away I hope.
> > -Daniel
>
>
> Sure, I will definitely add this to my TODOs for after landing (hopefully)
> this patch set (after a few more iterations)
> as indeed the required changes for using devm and drmm are non trivial and I prefer
> to avoid diverging here into multiple directions at once.
For the display side there's a very nice patch series from Philip Zabel
pending:
https://lore.kernel.org/dri-devel/20200911135724.25833-1-p.zabel@pengutronix.de/
I think you'll want to use this. It's not landed yet, so a nudge from
someone else also using it would help I think.
Cheers, Daniel
>
> Andrey
>
>
> >
> > > ---
> > > 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
> > >
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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