Hi all, Way back when we created the dma-buf spec it made sense to have kmap/unmap interfaces, since 32bit kernels with limited vmalloc space were still rather ubiquitous. But that idea (like many others) never caught on, was quickly replaced by vmaps covering the entire buffer for all real uses, and nowadays 64bit kernels rule the world. Currently merged upstream drivers (and we have a pile now) don't even bother to kmap for their private buffers, much less for anything shared. So since it was never used, and this idea's time is clearly over, let's remove it all. Only real change I had to do (aside from deleting lots of dead code) was in the tegra driver. But even there I suspect the dma-buf kmap path has never been run in anger anywhere, it just doesn't make sense to put relocs into a dma-buf (as opposed to using a dma-buf for the target address of a reloc). Comments, reviews and testing very much appreciated. Cheers, Daniel Daniel Vetter (15): drm/tegra: Map cmdbuf once for reloc processing drm/tegra: Delete host1x_bo_ops->k(un)map drm/i915: Remove dma_buf_kmap selftest staging/android/ion: delete dma_buf->kmap/unmap implemenation drm/armada: Delete dma_buf->k(un)map implemenation drm/i915: Drop dma_buf->k(un)map drm/omapdrm: Drop dma_buf->k(un)map drm/tegra: Remove dma_buf->k(un)map dma-buf: Drop dma_buf_k(un)map drm/vmwgfx: Delete mmaping functions media/videobuf2: Drop dma_buf->k(un)map support drm/tee_shm: Drop dma_buf_k(unmap) support xen/gntdev-dmabuf: Ditch dummy map functions sample/vfio-mdev/mbocs: Remove dma_buf_k(un)map support dma-buf: Remove kernel map/unmap hooks drivers/dma-buf/dma-buf.c | 63 +---------- drivers/gpu/drm/armada/armada_gem.c | 12 --- drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c | 36 ------- .../drm/i915/gem/selftests/i915_gem_dmabuf.c | 101 ------------------ .../gpu/drm/i915/gem/selftests/mock_dmabuf.c | 16 --- drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 21 ---- drivers/gpu/drm/tegra/gem.c | 40 ------- drivers/gpu/drm/vmwgfx/vmwgfx_prime.c | 33 ------ drivers/gpu/host1x/job.c | 21 ++-- .../common/videobuf2/videobuf2-dma-contig.c | 8 -- .../media/common/videobuf2/videobuf2-dma-sg.c | 8 -- .../common/videobuf2/videobuf2-vmalloc.c | 8 -- drivers/misc/fastrpc.c | 8 -- drivers/staging/android/ion/ion.c | 14 --- drivers/tee/tee_shm.c | 6 -- drivers/xen/gntdev-dmabuf.c | 23 ---- include/linux/dma-buf.h | 27 ----- include/linux/host1x.h | 13 --- samples/vfio-mdev/mbochs.c | 16 --- 19 files changed, 10 insertions(+), 464 deletions(-) -- 2.24.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
