| Message ID | 20200814024114.1177553-14-robdclark@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iommu/arm-smmu: Add Adreno SMMU specific implementation | expand |
On Thu 13 Aug 21:41 CDT 2020, Rob Clark wrote: > From: Jordan Crouse <jcrouse@codeaurora.org> > > Use the aperture settings from the IOMMU domain to set up the virtual > address range for the GPU. This allows us to transparently deal with > IOMMU side features (like split pagetables). > Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> > Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org> > Signed-off-by: Rob Clark <robdclark@chromium.org> > --- > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 13 +++++++++++-- > drivers/gpu/drm/msm/msm_iommu.c | 7 +++++++ > 2 files changed, 18 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > index 533a34b4cce2..34e6242c1767 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > @@ -192,9 +192,18 @@ adreno_iommu_create_address_space(struct msm_gpu *gpu, > struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type); > struct msm_mmu *mmu = msm_iommu_new(&pdev->dev, iommu); > struct msm_gem_address_space *aspace; > + u64 start, size; > > - aspace = msm_gem_address_space_create(mmu, "gpu", SZ_16M, > - 0xffffffff - SZ_16M); > + /* > + * Use the aperture start or SZ_16M, whichever is greater. This will > + * ensure that we align with the allocated pagetable range while still > + * allowing room in the lower 32 bits for GMEM and whatnot > + */ > + start = max_t(u64, SZ_16M, iommu->geometry.aperture_start); > + size = iommu->geometry.aperture_end - start + 1; > + > + aspace = msm_gem_address_space_create(mmu, "gpu", > + start & GENMASK(48, 0), size); > > if (IS_ERR(aspace) && !IS_ERR(mmu)) > mmu->funcs->destroy(mmu); > diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c > index 3a381a9674c9..1b6635504069 100644 > --- a/drivers/gpu/drm/msm/msm_iommu.c > +++ b/drivers/gpu/drm/msm/msm_iommu.c > @@ -36,6 +36,10 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova, > struct msm_iommu *iommu = to_msm_iommu(mmu); > size_t ret; > > + /* The arm-smmu driver expects the addresses to be sign extended */ > + if (iova & BIT_ULL(48)) > + iova |= GENMASK_ULL(63, 49); > + > ret = iommu_map_sg(iommu->domain, iova, sgt->sgl, sgt->nents, prot); > WARN_ON(!ret); > > @@ -46,6 +50,9 @@ static int msm_iommu_unmap(struct msm_mmu *mmu, uint64_t iova, size_t len) > { > struct msm_iommu *iommu = to_msm_iommu(mmu); > > + if (iova & BIT_ULL(48)) > + iova |= GENMASK_ULL(63, 49); > + > iommu_unmap(iommu->domain, iova, len); > > return 0; > -- > 2.26.2 >
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c index 533a34b4cce2..34e6242c1767 100644 --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c @@ -192,9 +192,18 @@ adreno_iommu_create_address_space(struct msm_gpu *gpu, struct iommu_domain *iommu = iommu_domain_alloc(&platform_bus_type); struct msm_mmu *mmu = msm_iommu_new(&pdev->dev, iommu); struct msm_gem_address_space *aspace; + u64 start, size; - aspace = msm_gem_address_space_create(mmu, "gpu", SZ_16M, - 0xffffffff - SZ_16M); + /* + * Use the aperture start or SZ_16M, whichever is greater. This will + * ensure that we align with the allocated pagetable range while still + * allowing room in the lower 32 bits for GMEM and whatnot + */ + start = max_t(u64, SZ_16M, iommu->geometry.aperture_start); + size = iommu->geometry.aperture_end - start + 1; + + aspace = msm_gem_address_space_create(mmu, "gpu", + start & GENMASK(48, 0), size); if (IS_ERR(aspace) && !IS_ERR(mmu)) mmu->funcs->destroy(mmu); diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 3a381a9674c9..1b6635504069 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -36,6 +36,10 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova, struct msm_iommu *iommu = to_msm_iommu(mmu); size_t ret; + /* The arm-smmu driver expects the addresses to be sign extended */ + if (iova & BIT_ULL(48)) + iova |= GENMASK_ULL(63, 49); + ret = iommu_map_sg(iommu->domain, iova, sgt->sgl, sgt->nents, prot); WARN_ON(!ret); @@ -46,6 +50,9 @@ static int msm_iommu_unmap(struct msm_mmu *mmu, uint64_t iova, size_t len) { struct msm_iommu *iommu = to_msm_iommu(mmu); + if (iova & BIT_ULL(48)) + iova |= GENMASK_ULL(63, 49); + iommu_unmap(iommu->domain, iova, len); return 0;