On Tue, Oct 13, 2015 at 04:00:45PM +0900, Joonyoung Shim wrote: > Hi, > > This patchset is about gem codes update of exynos-drm. > > The first and second patches are cleanup to remove useless codes. > The rest is to support cachable gem allocation. > > The exynos-drm uses DMA mapping API to allocate/mmap buffer of gem. If > it is cachable, does it with DMA_ATTR_NON_CONSISTENT attribute, but > DMA_ATTR_NON_CONSISTENT isn't supported in DMA mapping API of ARM, so it > doesn't give any effects. > > This patchset introduces new buffer allocation to use > drm_gem_get/put_pages() instead of DMA mapping API. It will be used > for the rest except allocation of physically continuous buffer on > non-iommu, then exynos-drm can support cachable buffer of gem. Also it > can support physically non-continuous buffer on non-iommu. > > EXYNOS_BO_CONTIG flag on iommu is ambiguous because it doesn't care > whether buffer is continuous physically if iommu is supported. This > patchset always will use EXYNOS_BO_CONTIG flag on iommu and then can > mean that the buffer is continuous for device. > > There is no user API to control cache coherence for the cpu and device > about cachable buffer. This patchset introduces two ioctls for cpu > access of gem object from user. It will be synced properly in order for > the cpu and device if buffer of gem object is cachable. Out of curiosity, where's the userspace part for this work? Usually kernel abi extensions come with a link to the relevant branch for easier review. -Daniel > > Thanks. > > Joonyoung Shim (9): > drm/exynos: eliminate useless codes of exynos_drm_gem.h > drm/exynos: use directly DMA mapping APIs on g2d > drm/exynos: remove using non-consistent DMA attribute > drm/exynos: split buffer allocation using DMA mapping API on non-iommu > drm/exynos: introduce buffer allocation using drm_gem_get/put_pages() > drm/exynos: switch to new buffer allocation > drm/exynos: always use EXYNOS_BO_CONTIG flag on iommu > drm/exynos: use DMA_ERROR_CODE > drm/exynos: add ioctls for cpu access of gem object from user > > drivers/gpu/drm/exynos/exynos_drm_drv.c | 4 + > drivers/gpu/drm/exynos/exynos_drm_fb.c | 32 +--- > drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 14 +- > drivers/gpu/drm/exynos/exynos_drm_g2d.c | 10 +- > drivers/gpu/drm/exynos/exynos_drm_gem.c | 288 ++++++++++++++++++------------ > drivers/gpu/drm/exynos/exynos_drm_gem.h | 56 ++---- > include/uapi/drm/exynos_drm.h | 23 ++- > 7 files changed, 225 insertions(+), 202 deletions(-) > > -- > 1.9.1 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
