Am Mittwoch, den 14.08.2019, 11:59 +0200 schrieb Guido Günther:
> Hi,
> On Fri, Aug 09, 2019 at 02:04:23PM +0200, Lucas Stach wrote:
> > In preparation to having a context per process, etnaviv_gem_mapping_get
> > should not use the current GPU context, but needs to be told which
> > context to use.
> >
> > > > Signed-off-by: Lucas Stach <l.st...@pengutronix.de>
> > > > Reviewed-by: Philipp Zabel <p.za...@pengutronix.de>
> > ---
> > drivers/gpu/drm/etnaviv/etnaviv_gem.c | 22 ++++++++++++--------
> > drivers/gpu/drm/etnaviv/etnaviv_gem.h | 3 ++-
> > drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 3 ++-
> > 3 files changed, 17 insertions(+), 11 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> > b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> > index 0ccc3c4dffc4..04c8170f76cd 100644
> > --- a/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> > +++ b/drivers/gpu/drm/etnaviv/etnaviv_gem.c
> > @@ -248,7 +248,8 @@ void etnaviv_gem_mapping_unreference(struct
> > etnaviv_vram_mapping *mapping)
> > }
> >
> > struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
> > > > - struct drm_gem_object *obj, struct etnaviv_gpu *gpu)
> > > > + struct drm_gem_object *obj, struct etnaviv_gpu *gpu,
> > > > + struct etnaviv_iommu_context *mmu_context)
> > {
> > > > struct etnaviv_gem_object *etnaviv_obj = to_etnaviv_bo(obj);
> > > > struct etnaviv_vram_mapping *mapping;
> > @@ -256,7 +257,7 @@ struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
> > > > int ret = 0;
> >
> > > > mutex_lock(&etnaviv_obj->lock);
> > > > - mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj,
> > > > gpu->mmu_context);
> > > > + mapping = etnaviv_gem_get_vram_mapping(etnaviv_obj,
> > > > mmu_context);
> > > > if (mapping) {
> > > > /*
> > > > * Holding the object lock prevents the use count
> > > > changing
> > @@ -265,12 +266,12 @@ struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
> > > > * the MMU owns this mapping to close this race.
> > > > */
> > > > if (mapping->use == 0) {
> > > > - mutex_lock(&gpu->mmu_context->lock);
> > > > - if (mapping->context == gpu->mmu_context)
> > > > + mutex_lock(&mmu_context->lock);
> > > > + if (mapping->context == mmu_context)
> > > > mapping->use += 1;
> > > > else
> > > > mapping = NULL;
> > > > - mutex_unlock(&gpu->mmu_context->lock);
> > > > + mutex_unlock(&mmu_context->lock);
> > > > if (mapping)
> > > > goto out;
> > > > } else {
> > @@ -303,11 +304,12 @@ struct etnaviv_vram_mapping *etnaviv_gem_mapping_get(
> > > > list_del(&mapping->obj_node);
> > > > }
> >
> > > > - mapping->context = gpu->mmu_context;
> > > > + etnaviv_iommu_context_get(mmu_context);
> > > > + mapping->context = mmu_context;
> > > > mapping->use = 1;
> >
> > > > - ret = etnaviv_iommu_map_gem(gpu->mmu_context, etnaviv_obj,
> > > > - gpu->memory_base, mapping);
> > > > + ret = etnaviv_iommu_map_gem(mmu_context, etnaviv_obj,
> > > > gpu->memory_base,
> > > > + mapping);
> > > > if (ret < 0)
> > kfree(mapping);
>
> Does this error path need a etnaviv_iommu_context_put()?
Good catch! Thanks, I'll fix this.
Regards,
Lucas
>
> apart from that
>
> > Reviewed-by: Guido Günther <a...@sigxcpu.org>
>
> -- Guido
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