diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index a50f9ba3bafa..9a92bcf982b8 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -438,6 +438,6 @@ void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu) if (gpu->aspace) { gpu->aspace->mmu->funcs->detach(gpu->aspace->mmu, iommu_ports, ARRAY_SIZE(iommu_ports)); - msm_gem_address_space_destroy(gpu->aspace); + msm_gem_address_space_put(gpu->aspace); } } diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c index a4e1206a66a8..6295204cabe9 100644 --- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c @@ -169,7 +169,7 @@ static void mdp4_destroy(struct msm_kms *kms) if (aspace) { aspace->mmu->funcs->detach(aspace->mmu, iommu_ports, ARRAY_SIZE(iommu_ports)); - msm_gem_address_space_destroy(aspace); + msm_gem_address_space_put(aspace); } if (mdp4_kms->rpm_enabled) diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c index 24f76f48d56c..d3d6b4cae1e6 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c @@ -175,7 +175,7 @@ static void mdp5_kms_destroy(struct msm_kms *kms) if (aspace) { aspace->mmu->funcs->detach(aspace->mmu, iommu_ports, ARRAY_SIZE(iommu_ports)); - msm_gem_address_space_destroy(aspace); + msm_gem_address_space_put(aspace); } } diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index b885c3d5ae4d..28b6f9ba5066 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -191,7 +191,8 @@ void msm_gem_unmap_vma(struct msm_gem_address_space *aspace, int msm_gem_map_vma(struct msm_gem_address_space *aspace, struct msm_gem_vma *vma, struct sg_table *sgt, int npages); -void msm_gem_address_space_destroy(struct msm_gem_address_space *aspace); +void msm_gem_address_space_put(struct msm_gem_address_space *aspace); + struct msm_gem_address_space * msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain, const char *name); diff --git a/drivers/gpu/drm/msm/msm_gem.h b/drivers/gpu/drm/msm/msm_gem.h index 7d529516b332..1b4cf20043ea 100644 --- a/drivers/gpu/drm/msm/msm_gem.h +++ b/drivers/gpu/drm/msm/msm_gem.h @@ -18,6 +18,7 @@ #ifndef __MSM_GEM_H__ #define __MSM_GEM_H__ +#include #include #include "msm_drv.h" @@ -31,6 +32,7 @@ struct msm_gem_address_space { */ struct drm_mm mm; struct msm_mmu *mmu; + struct kref kref; }; struct msm_gem_vma { diff --git a/drivers/gpu/drm/msm/msm_gem_vma.c b/drivers/gpu/drm/msm/msm_gem_vma.c index b654eca7636a..f285d7e210db 100644 --- a/drivers/gpu/drm/msm/msm_gem_vma.c +++ b/drivers/gpu/drm/msm/msm_gem_vma.c @@ -19,6 +19,25 @@ #include "msm_gem.h" #include "msm_mmu.h" +static void +msm_gem_address_space_destroy(struct kref *kref) +{ + struct msm_gem_address_space *aspace = container_of(kref, + struct msm_gem_address_space, kref); + + drm_mm_takedown(&aspace->mm); + if (aspace->mmu) + aspace->mmu->funcs->destroy(aspace->mmu); + kfree(aspace); +} + + +void msm_gem_address_space_put(struct msm_gem_address_space *aspace) +{ + if (aspace) + kref_put(&aspace->kref, msm_gem_address_space_destroy); +} + void msm_gem_unmap_vma(struct msm_gem_address_space *aspace, struct msm_gem_vma *vma, struct sg_table *sgt) @@ -34,6 +53,8 @@ msm_gem_unmap_vma(struct msm_gem_address_space *aspace, drm_mm_remove_node(&vma->node); vma->iova = 0; + + msm_gem_address_space_put(aspace); } int @@ -57,16 +78,10 @@ msm_gem_map_vma(struct msm_gem_address_space *aspace, size, IOMMU_READ | IOMMU_WRITE); } - return ret; -} + /* Get a reference to the aspace to keep it around */ + kref_get(&aspace->kref); -void -msm_gem_address_space_destroy(struct msm_gem_address_space *aspace) -{ - drm_mm_takedown(&aspace->mm); - if (aspace->mmu) - aspace->mmu->funcs->destroy(aspace->mmu); - kfree(aspace); + return ret; } struct msm_gem_address_space * @@ -85,5 +100,7 @@ msm_gem_address_space_create(struct device *dev, struct iommu_domain *domain, drm_mm_init(&aspace->mm, (domain->geometry.aperture_start >> PAGE_SHIFT), (domain->geometry.aperture_end >> PAGE_SHIFT) - 1); + kref_init(&aspace->kref); + return aspace; }