On Sat, 12 Sep 2026 00:28:02 +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. > > Signed-off-by: Adrián Larumbe <[email protected]> Reviewed-by: Boris Brezillon <[email protected]> One remark below. > --- > drivers/gpu/drm/panfrost/panfrost_device.c | 8 +++++++- > drivers/gpu/drm/panfrost/panfrost_drv.c | 6 ------ > drivers/gpu/drm/panfrost/panfrost_gem.c | 26 > ++++++++++++++---------- > drivers/gpu/drm/panfrost/panfrost_gem.h | 7 ++++--- > drivers/gpu/drm/panfrost/panfrost_gem_shrinker.c | 8 ++------ > 5 files changed, 28 insertions(+), 27 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); It feels weird to have the GEM subsystem initialized last when you consider the fact other subsystems might want to allocate GEMs in their _init() function. I know it's where the panfrost_gem_init() is right now, and that ultimately it doesn't prevent anyone from allocating GEMs, but I think it would make sense have this called before any of the other subsystem init functions, still. > + 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_gem.c > b/drivers/gpu/drm/panfrost/panfrost_gem.c > index 3a7fce428898..f39c0f50ed4f 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_gem.c > +++ b/drivers/gpu/drm/panfrost/panfrost_gem.c > @@ -15,20 +15,24 @@ > #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) { > + int 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); > + } > > - if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && > - !panfrost_transparent_hugepage) > - return; > + return panfrost_gem_shrinker_init(pfdev); > +} > > - 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); > +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); > } >
