On Fri, 28 Aug 2026 21:56:41 +0100 Adrián Larumbe <[email protected]> wrote:
> Since the moment we call drm_dev_register() the device should be in a > position to accept jobs, so it's best if the shrinker is already > initialized by then. > > On top of that, make shrinker functions take an panfrost_device pointer > like other functions in the same sequence and rename them accordingly. > > Essentially mimic the init/fini behaviour in Panthor. > > On top of that, remove the config feature check, because it's unnecessary. I don't think that's accurate anymore (we still have a config check, except it's encoded directly in the panfrost_transparent_hugepage definition), and I think I'd prefer if this change was done in a separate commit. > > Signed-off-by: Adrián Larumbe <[email protected]> > --- > drivers/gpu/drm/panfrost/panfrost_device.c | 8 +++++++- > drivers/gpu/drm/panfrost/panfrost_drv.c | 6 ------ > drivers/gpu/drm/panfrost/panfrost_drv.h | 4 ++++ > drivers/gpu/drm/panfrost/panfrost_gem.c | 25 > ++++++++++++++---------- > drivers/gpu/drm/panfrost/panfrost_gem.h | 7 ++++--- > drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c | 8 ++------ > 6 files changed, 32 insertions(+), 26 deletions(-) > > diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c > b/drivers/gpu/drm/panfrost/panfrost_device.c > index 485349faf251..05c40d5a20b5 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_device.c > +++ b/drivers/gpu/drm/panfrost/panfrost_device.c > @@ -280,9 +280,14 @@ int panfrost_device_init(struct panfrost_device *pfdev) > if (err) > goto out_job; > > - panfrost_gem_init(pfdev); > + err = panfrost_gem_init(pfdev); > + if (err) > + goto out_perfcnt; > > return 0; > + > +out_perfcnt: > + panfrost_perfcnt_fini(pfdev); > out_job: > panfrost_jm_fini(pfdev); > out_mmu: > @@ -304,6 +309,7 @@ int panfrost_device_init(struct panfrost_device *pfdev) > > void panfrost_device_fini(struct panfrost_device *pfdev) > { > + panfrost_gem_fini(pfdev); > panfrost_perfcnt_fini(pfdev); > panfrost_jm_fini(pfdev); > panfrost_mmu_fini(pfdev); > diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c > b/drivers/gpu/drm/panfrost/panfrost_drv.c > index 96a66d673ba6..9882a3ede75f 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_drv.c > +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c > @@ -1003,14 +1003,9 @@ static int panfrost_probe(struct platform_device *pdev) > if (err < 0) > goto err_out1; > > - err = panfrost_gem_shrinker_init(&pfdev->base); > - if (err) > - goto err_out2; > > return 0; > > -err_out2: > - drm_dev_unregister(&pfdev->base); > err_out1: > pm_runtime_disable(pfdev->base.dev); > panfrost_device_fini(pfdev); > @@ -1024,7 +1019,6 @@ static void panfrost_remove(struct platform_device > *pdev) > struct panfrost_device *pfdev = platform_get_drvdata(pdev); > > drm_dev_unregister(&pfdev->base); > - panfrost_gem_shrinker_cleanup(&pfdev->base); > > pm_runtime_get_sync(pfdev->base.dev); > pm_runtime_disable(pfdev->base.dev); > diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.h > b/drivers/gpu/drm/panfrost/panfrost_drv.h > index a2277ec61aab..bac0c415d4da 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_drv.h > +++ b/drivers/gpu/drm/panfrost/panfrost_drv.h > @@ -4,6 +4,10 @@ > #ifndef __PANFROST_DRV_H__ > #define __PANFROST_DRV_H__ > > +#if IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) > extern bool panfrost_transparent_hugepage; > +#else > +#define panfrost_transparent_hugepage false > +#endif > > #endif > diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c > b/drivers/gpu/drm/panfrost/panfrost_gem.c > index 3a7fce428898..7b993a089af2 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gem.c > +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c > @@ -15,20 +15,25 @@ > #include "panfrost_gem.h" > #include "panfrost_mmu.h" > > -void panfrost_gem_init(struct panfrost_device *pfdev) > +int panfrost_gem_init(struct panfrost_device *pfdev) > { > int err; > > - if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && > - !panfrost_transparent_hugepage) > - return; > + if (panfrost_transparent_hugepage) { > + err = drm_gem_huge_mnt_create(&pfdev->base, "within_size"); > + if (drm_gem_get_huge_mnt(&pfdev->base)) > + drm_info(&pfdev->base, "Using Transparent Hugepage\n"); > + else if (err) > + drm_warn(&pfdev->base, > + "Can't use Transparent Hugepage (%d)\n", err); This can probably be turned into: if (err) drm_warn(&pfdev->base, "Can't use Transparent Hugepage (%d)\n", err); else drm_info(&pfdev->base, "Using Transparent Hugepage\n"); since there's no world where drm_gem_get_huge_mnt() would return NULL if drm_gem_huge_mnt_create() returns 0 when CONFIG_TRANSPARENT_HUGEPAGE=y. The pre-existing checks where there to cover CONFIG_TRANSPARENT_HUGEPAGE=n which you already cover by not entering this branch. > + } > > - err = drm_gem_huge_mnt_create(&pfdev->base, "within_size"); > - if (drm_gem_get_huge_mnt(&pfdev->base)) > - drm_info(&pfdev->base, "Using Transparent Hugepage\n"); > - else if (err) > - drm_warn(&pfdev->base, "Can't use Transparent Hugepage (%d)\n", > - err); > + return panfrost_gem_shrinker_init(pfdev); > +} > + > +void panfrost_gem_fini(struct panfrost_device *pfdev) > +{ > + panfrost_gem_shrinker_fini(pfdev); > } > > #ifdef CONFIG_DEBUG_FS > diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.h > b/drivers/gpu/drm/panfrost/panfrost_gem.h > index 79d4377019e9..5c823cdbd980 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gem.h > +++ b/drivers/gpu/drm/panfrost/panfrost_gem.h > @@ -129,7 +129,8 @@ drm_mm_node_to_panfrost_mapping(struct drm_mm_node *node) > return container_of(node, struct panfrost_gem_mapping, mmnode); > } > > -void panfrost_gem_init(struct panfrost_device *pfdev); > +int panfrost_gem_init(struct panfrost_device *pfdev); > +void panfrost_gem_fini(struct panfrost_device *pfdev); > > struct drm_gem_object *panfrost_gem_create_object(struct drm_device *dev, > size_t size); > > @@ -154,8 +155,8 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo, > void panfrost_gem_mapping_put(struct panfrost_gem_mapping *mapping); > void panfrost_gem_teardown_mappings_locked(struct panfrost_gem_object *bo); > > -int panfrost_gem_shrinker_init(struct drm_device *dev); > -void panfrost_gem_shrinker_cleanup(struct drm_device *dev); > +int panfrost_gem_shrinker_init(struct panfrost_device *pfdev); > +void panfrost_gem_shrinker_fini(struct panfrost_device *pfdev); > > void panfrost_gem_set_label(struct drm_gem_object *obj, const char *label); > int panfrost_gem_sync(struct drm_gem_object *obj, u32 type, > diff --git a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c > b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c > index 2fe967a90bcb..fefae87535d6 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c > +++ b/drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c > @@ -95,10 +95,8 @@ panfrost_gem_shrinker_scan(struct shrinker *shrinker, > struct shrink_control *sc) > * > * This function registers and sets up the panfrost shrinker. > */ > -int panfrost_gem_shrinker_init(struct drm_device *dev) > +int panfrost_gem_shrinker_init(struct panfrost_device *pfdev) > { > - struct panfrost_device *pfdev = to_panfrost_device(dev); > - > pfdev->shrinker = shrinker_alloc(0, "drm-panfrost"); > if (!pfdev->shrinker) > return -ENOMEM; > @@ -118,10 +116,8 @@ int panfrost_gem_shrinker_init(struct drm_device *dev) > * > * This function unregisters the panfrost shrinker. > */ > -void panfrost_gem_shrinker_cleanup(struct drm_device *dev) > +void panfrost_gem_shrinker_fini(struct panfrost_device *pfdev) > { > - struct panfrost_device *pfdev = to_panfrost_device(dev); > - > if (pfdev->shrinker) > shrinker_free(pfdev->shrinker); > } >
