dma-buf heaps framework · Maintained

Maintainers

• M Sumit Semwal <sumit.semwal@linaro.org>
• R Benjamin Gaignard <benjamin.gaignard@collabora.com>
• R Brian Starkey <Brian.Starkey@arm.com>
• R John Stultz <jstultz@google.com>
• R T.J. Mercier <tjmercier@google.com>

Paths

• F Documentation/userspace-api/dma-buf-heaps.rst
• F drivers/dma-buf/dma-heap.c
• F drivers/dma-buf/heaps/*
• F include/linux/dma-heap.h
• F include/uapi/linux/dma-heap.h
• F tools/testing/selftests/dmabuf-heaps/

Last 30 days

Recent patches

Most-recent 26 patches in this subsystem on linux-devicetree, ordered by date desc.

• STALE77d [PATCH v3 2/6] dma-buf: dma-heap: split dma_heap_add
  2026-03-06 · Albert Esteve <hidden>
• STALE77d REVIEWED: 6 (6M) [PATCH v3 1/6] dma-buf: dma-heap: Keep track of the heap device struct
  2026-03-06 · Albert Esteve <hidden>
• STALE104d [PATCH v2 4/6] dma-buf: heaps: Add Coherent heap to dmabuf heaps
  2026-03-03 · Albert Esteve <hidden>
• STALE104d [PATCH v2 2/6] dma-buf: dma-heap: split dma_heap_add
  2026-03-03 · Albert Esteve <hidden>
• STALE104d [PATCH v2 1/6] dma-buf: dma-heap: Keep track of the heap device struct
  2026-03-03 · Albert Esteve <hidden>
• COLD43d [PATCH v2 05/10] dma-buf: heaps: Add debugfs support
  2026-01-22 · Thierry Reding <thierry.reding@kernel.org>
• STALE259d [PATCH 4/9] dma-buf: heaps: Add debugfs support
  2025-09-02 · Thierry Reding <hidden>
• STALE279d [PATCH v7 5/5] dma-buf: heaps: cma: Create CMA heap for each CMA reserved region
  2025-07-21 · Maxime Ripard <mripard@kernel.org>
• STALE279d [PATCH v7 1/5] doc: dma-buf: List the heaps by name
  2025-07-21 · Maxime Ripard <mripard@kernel.org>
• STALE705d [PATCH 4/8] dma-buf: heaps: Add ECC protection flags
  2024-05-15 · Maxime Ripard <mripard@kernel.org>
• STALE705d [PATCH 3/8] dma-buf: heaps: Import uAPI header
  2024-05-15 · Maxime Ripard <mripard@kernel.org>
• STALE871d [PATCH v4,06/22] dma-heap: Add proper kref handling on dma-buf heaps
  2024-01-29 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE871d [PATCH v4,07/22] dma-heap: Provide accessors so that in-kernel drivers can allocate dmabufs from specific heaps
  2024-01-29 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE871d [PATCH v4,05/22] dma-buf: heaps: Deduplicate docs and adopt common format
  2024-01-29 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE882d [PATCH v3,05/21] dma-buf: heaps: Deduplicate docs and adopt common format
  2023-12-06 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE882d [PATCH v3,06/21] dma-heap: Add proper kref handling on dma-buf heaps
  2023-12-06 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE882d [PATCH v3,07/21] dma-heap: Provide accessors so that in-kernel drivers can allocate dmabufs from specific heaps
  2023-12-06 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE947d [PATCH v2,06/21] dma-heap: Add proper kref handling on dma-buf heaps
  2023-11-06 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE947d [PATCH v2,07/21] dma-heap: Provide accessors so that in-kernel drivers can allocate dmabufs from specific heaps
  2023-11-06 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE947d [PATCH v2,05/21] dma-buf: heaps: Deduplicate docs and adopt common format
  2023-11-06 · Yunfei Dong <yunfei.dong@mediatek.com>
• STALE941d [PATCH 3/9] dma-heap: Provide accessors so that in-kernel drivers can allocate dmabufs from specific heaps
  2023-09-11 · Yong Wu <yong.wu@mediatek.com>
• STALE941d [PATCH 2/9] dma-heap: Add proper kref handling on dma-buf heaps
  2023-09-11 · Yong Wu <yong.wu@mediatek.com>
• STALE941d [PATCH 1/9] dma-buf: heaps: Deduplicate docs and adopt common format
  2023-09-11 · Yong Wu <yong.wu@mediatek.com>
• STALE2022d [PATCH v2 3/4] dma-buf: add export symbol for dma-heap
  2020-12-01 · Minchan Kim <minchan@kernel.org>
• STALE2015d [PATCH 2/4] dma-buf: add export symbol for dma-heap
  2020-11-17 · Minchan Kim <minchan@kernel.org>
• STALE2127d [PATCH 1/3] dma-buf: add missing EXPORT_SYMBOL_GPL() for dma heaps
  2020-08-18 · Hyesoo Yu <hidden>

Needs attention (review trailers in, no pickup)

Patches with review trailers that haven't landed in mainline and haven't been Acked by a maintainer. Oldest first.

• STALE77d REVIEWED: 6 (6M) [PATCH v3 1/6] dma-buf: dma-heap: Keep track of the heap device struct
  2026-03-06 · Albert Esteve <hidden> · 1 Reviewed-by

Quiet for 30+ days

Patches with no review trailers and no replies. Either the author is heads-down elsewhere or these slipped through. Oldest first.

• COLD43d [PATCH v2 05/10] dma-buf: heaps: Add debugfs support
  2026-01-22 · Thierry Reding <thierry.reding@kernel.org>
• STALE104d [PATCH v2 2/6] dma-buf: dma-heap: split dma_heap_add
  2026-03-03 · Albert Esteve <hidden>
• STALE77d [PATCH v3 2/6] dma-buf: dma-heap: split dma_heap_add
  2026-03-06 · Albert Esteve <hidden>