From: John Stultz <john.stultz@linaro.org>
To: lkml <linux-kernel@vger.kernel.org>
Cc: John Stultz <john.stultz@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Sumit Semwal <sumit.semwal@linaro.org>,
"Andrew F. Davis" <afd@ti.com>,
Benjamin Gaignard <benjamin.gaignard@linaro.org>,
Liam Mark <lmark@codeaurora.org>,
Pratik Patel <pratikp@codeaurora.org>,
Laura Abbott <labbott@redhat.com>,
Brian Starkey <Brian.Starkey@arm.com>,
Chenbo Feng <fengc@google.com>,
Alistair Strachan <astrachan@google.com>,
Sandeep Patil <sspatil@google.com>,
Hridya Valsaraju <hridya@google.com>,
Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Robin Murphy <robin.murphy@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org,
linux-mm@kvack.org
Subject: [RFC][PATCH 1/4] devicetree: bindings: Add linux,cma-heap tag for reserved memory
Date: Fri, 1 May 2020 07:39:46 +0000 [thread overview]
Message-ID: <20200501073949.120396-2-john.stultz@linaro.org> (raw)
In-Reply-To: <20200501073949.120396-1-john.stultz@linaro.org>
This patch adds a linux,cma-heap property for CMA reserved memory
regions, which will be used to allow the region to be exposed via
the DMA-BUF Heaps interface
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Andrew F. Davis" <afd@ti.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Cc: Liam Mark <lmark@codeaurora.org>
Cc: Pratik Patel <pratikp@codeaurora.org>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Brian Starkey <Brian.Starkey@arm.com>
Cc: Chenbo Feng <fengc@google.com>
Cc: Alistair Strachan <astrachan@google.com>
Cc: Sandeep Patil <sspatil@google.com>
Cc: Hridya Valsaraju <hridya@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: devicetree@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-mm@kvack.org
Signed-off-by: John Stultz <john.stultz@linaro.org>
---
.../devicetree/bindings/reserved-memory/reserved-memory.txt | 3 +++
1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
index bac4afa3b197..e97b6a4c3bc0 100644
--- a/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt
@@ -68,6 +68,9 @@ Linux implementation note:
- If a "linux,cma-default" property is present, then Linux will use the
region for the default pool of the contiguous memory allocator.
+- If a "linux,cma-heap" property is present, then Linux will expose the
+ the CMA region via the DMA-BUF Heaps interface.
+
- If a "linux,dma-default" property is present, then Linux will use the
region for the default pool of the consistent DMA allocator.
--
2.17.1
next prev parent reply other threads:[~2020-05-01 7:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-01 7:39 [RFC][PATCH 0/4] Support non-default CMA regions to the dmabuf heaps interface John Stultz
2020-05-01 7:39 ` John Stultz [this message]
2020-05-01 10:42 ` [RFC][PATCH 1/4] devicetree: bindings: Add linux,cma-heap tag for reserved memory Brian Starkey
2020-05-01 18:40 ` John Stultz
2020-05-04 8:50 ` Brian Starkey
2020-05-06 16:04 ` Andrew F. Davis
2020-05-06 16:30 ` John Stultz
2020-05-06 17:35 ` Andrew F. Davis
2020-05-06 18:34 ` John Stultz
2020-05-01 7:39 ` [RFC][PATCH 2/4] mm: cma: Add dma_heap flag to cma structure John Stultz
2020-05-01 10:48 ` Brian Starkey
2020-05-01 18:42 ` John Stultz
2020-05-01 7:39 ` [RFC][PATCH 3/4] dma-buf: cma_heap: Extend logic to export CMA regions tagged with "linux,cma-heap" John Stultz
2020-05-01 10:21 ` Brian Starkey
2020-05-01 11:08 ` Robin Murphy
2020-05-01 19:01 ` John Stultz
2020-05-04 9:06 ` Brian Starkey
2020-05-12 16:37 ` Rob Herring
2020-05-13 10:44 ` Brian Starkey
2020-05-14 14:52 ` Rob Herring
2020-05-15 9:32 ` Brian Starkey
2020-05-01 7:39 ` [RFC][PATCH 4/4] example: dts: hi3660-hikey960: Add dts entries to test cma heap binding John Stultz
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