The following series implements fence and converts dma-buf and android sync to use it. Patch 5 and 6 add support for polling to dma-buf, blocking until all fences are signaled. Patch 7 and 8 provide some helpers, and allow use of RCU in the reservation api. The helpers make it easier to convert ttm, and make dealing with rcu less painful.
Patches slightly updated to fix compilation with armada and new atomic primitives, but otherwise identical.
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Maarten Lankhorst (8): fence: dma-buf cross-device synchronization (v17) seqno-fence: Hardware dma-buf implementation of fencing (v5) dma-buf: use reservation objects android: convert sync to fence api, v5 reservation: add support for fences to enable cross-device synchronisation dma-buf: add poll support, v3 reservation: update api and add some helpers reservation: add suppport for read-only access using rcu
Documentation/DocBook/device-drivers.tmpl | 3 drivers/base/Kconfig | 9 drivers/base/Makefile | 2 drivers/base/dma-buf.c | 168 ++++ drivers/base/fence.c | 468 ++++++++++++ drivers/base/reservation.c | 440 ++++++++++++ drivers/gpu/drm/armada/armada_gem.c | 2 drivers/gpu/drm/drm_prime.c | 8 drivers/gpu/drm/exynos/exynos_drm_dmabuf.c | 2 drivers/gpu/drm/i915/i915_gem_dmabuf.c | 3 drivers/gpu/drm/nouveau/nouveau_drm.c | 1 drivers/gpu/drm/nouveau/nouveau_gem.h | 1 drivers/gpu/drm/nouveau/nouveau_prime.c | 7 drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 2 drivers/gpu/drm/radeon/radeon_drv.c | 2 drivers/gpu/drm/radeon/radeon_prime.c | 8 drivers/gpu/drm/tegra/gem.c | 2 drivers/gpu/drm/ttm/ttm_object.c | 2 drivers/media/v4l2-core/videobuf2-dma-contig.c | 2 drivers/staging/android/Kconfig | 1 drivers/staging/android/Makefile | 2 drivers/staging/android/ion/ion.c | 3 drivers/staging/android/sw_sync.c | 6 drivers/staging/android/sync.c | 913 ++++++++---------------- drivers/staging/android/sync.h | 79 +- drivers/staging/android/sync_debug.c | 247 ++++++ drivers/staging/android/trace/sync.h | 12 include/drm/drmP.h | 3 include/linux/dma-buf.h | 21 - include/linux/fence.h | 355 +++++++++ include/linux/reservation.h | 82 ++ include/linux/seqno-fence.h | 119 +++ include/trace/events/fence.h | 128 +++ 33 files changed, 2435 insertions(+), 668 deletions(-) create mode 100644 drivers/base/fence.c create mode 100644 drivers/staging/android/sync_debug.c create mode 100644 include/linux/fence.h create mode 100644 include/linux/seqno-fence.h create mode 100644 include/trace/events/fence.h