From mboxrd@z Thu Jan 1 00:00:00 1970 From: tixy@linaro.org (Jon Medhurst (Tixy)) Date: Wed, 14 May 2014 10:15:38 +0100 Subject: [PATCH v6 05/11] drivers: of: add automated assignment of reserved regions to client devices In-Reply-To: <20140302054043.4F48AC414EF@trevor.secretlab.ca> References: <1393594976-16728-1-git-send-email-m.szyprowski@samsung.com> < 1393594976-16728-6-git-send-email-m.szyprowski@samsung.com> <20140302054043.4F48AC414EF@trevor.secretlab.ca> Message-ID: <1400058938.3395.13.camel@linaro1.home> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Sun, 2014-03-02 at 13:40 +0800, Grant Likely wrote: > On Fri, 28 Feb 2014 14:42:50 +0100, Marek Szyprowski wrote: > > This patch adds code for automated assignment of reserved memory regions > > to struct device. reserved_mem->ops->device_init()/device_cleanup() > > callbacks are called to perform reserved memory driver specific > > initialization and cleanup > > > > Based on previous code provided by Josh Cartwright > > > > Signed-off-by: Marek Szyprowski > > Hi Marek, > > I've not applied this one yet, only because there is still the open > issue of whether or not these functions should be called from drivers or > from core code. I don't actually have any problems with the content of > this patch. Once the user is sorted out I'll merge it. Has anything more come of these patches? I see some of the series is now in Linux 3.15, but the actual patches to let people use the feature aren't there yet, namely patches 5 though 8. My personal immediate interest in these is as a mechanism on arm64 to limit CMA to a region of memory that is actually DMA-able devices (e.g. below 4GB for 32-bit devices without an iommu). For reference, the mail archives for this series is at http://lkml.org/lkml/2014/2/28/237 -- Tixy