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Date: Wed, 22 Jan 2014 12:58:48 -0600 From: Josh Cartwright <joshc@...eaurora.org> To: Marek Szyprowski <m.szyprowski@...sung.com>, Grant Likely <grant.likely@...aro.org>, Rob Herring <robh+dt@...nel.org>, Arnd Bergmann <arnd@...db.de> Cc: linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org Subject: [PATCH RFC 0/4] reserved-memory regions/CMA in devicetree, again Hey Marek- What is the current status of the reserved-memory/CMA device tree support series? It looks like it's stalled out a bit since the revert[2]. Hopefully this series is a push in the right direction? --- This set is an adaptation of Marek's original patchset posted here[1], and then subsequently reverted here[2]. In [3], Grant proposed a new set of bindings after discussion in Edinburgh. This is a partially complete implementation of these proposed bindings. It's functionality is now split into two pieces, the first of which implements a default/fallback behavior for reserved-memory nodes; that is, reserved memory nodes describing fixed-address static regions will be unconditionally reserved, regardless of their intended use. In addition, it provides an interface for adding additional reserved-memory types, using a method similar to CLOCKSOURCE_OF_DECLARE(). The second piece uses the above method to provide support for reserved-memory nodes whose compatible = "shared-dma-pool". It makes use of CMA when available, and when a describing node has the 'reusable' property. There is basic support for dynamic allocation of memory reserved regions, however, noticeably missing is support for additional restrictions (use of alignment and alloc-ranges properties). [1]: http://lkml.kernel.org/g/1377527959-5080-1-git-send-email-m.szyprowski@samsung.com [2]: http://lkml.kernel.org/g/1381476448-14548-1-git-send-email-m.szyprowski@samsung.com [3]: http://lkml.kernel.org/g/20131030134702.19B57C402A0@trevor.secretlab.ca Grant Likely (1): of: document bindings for reserved-memory nodes Josh Cartwright (1): drivers: of: implement reserved-memory handling for dma Marek Szyprowski (2): drivers: of: add initialization code for reserved memory ARM: init: add support for reserved memory defined by device tree .../bindings/reserved-memory/reserved-memory.txt | 137 +++++++++++++++ arch/arm/mm/init.c | 3 + drivers/of/Kconfig | 13 ++ drivers/of/Makefile | 2 + drivers/of/of_reserved_mem.c | 188 +++++++++++++++++++++ drivers/of/of_reserved_mem_dma.c | 178 +++++++++++++++++++ drivers/of/platform.c | 4 + include/asm-generic/vmlinux.lds.h | 11 ++ include/linux/of_reserved_mem.h | 61 +++++++ 9 files changed, 597 insertions(+) create mode 100644 Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt create mode 100644 drivers/of/of_reserved_mem.c create mode 100644 drivers/of/of_reserved_mem_dma.c create mode 100644 include/linux/of_reserved_mem.h -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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