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Wed, 16 Jul 2014 09:39:07 -0700 (PDT) From: Michal Nazarewicz To: Zubair Lutfullah Kakakhel , ralf@linux-mips.org, catalin.marinas@arm.com, will.deacon@arm.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, arnd@arndb.de, gregkh@linuxfoundation.org, m.szyprowski@samsung.com Cc: x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mips@linux-mips.org, linux-arch@vger.kernel.org Subject: Re: [PATCH 4/4] mips: dma: Add cma support In-Reply-To: <1405525892-60383-5-git-send-email-Zubair.Kakakhel@imgtec.com> Organization: http://mina86.com/ References: <1405525892-60383-1-git-send-email-Zubair.Kakakhel@imgtec.com> <1405525892-60383-5-git-send-email-Zubair.Kakakhel@imgtec.com> User-Agent: Notmuch/0.17+15~gb65ca8e (http://notmuchmail.org) Emacs/24.4.50.1 (x86_64-unknown-linux-gnu) X-Face: PbkBB1w#)bOqd`iCe"Ds{e+!C7`pkC9a|f)Qo^BMQvy\q5x3?vDQJeN(DS?|-^$uMti[3D*#^_Ts"pU$jBQLq~Ud6iNwAw_r_o_4]|JO?]}P_}Nc&"p#D(ZgUb4uCNPe7~a[DbPG0T~!&c.y$Ur,=N4RT>]dNpd;KFrfMCylc}gc??'U2j,!8%xdD Face: 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 X-PGP: 50751FF4 X-PGP-FP: AC1F 5F5C D418 88F8 CC84 5858 2060 4012 5075 1FF4 X-Hashcash: 1:20:140716:will.deacon@arm.com::e13jxZb8Q7J2Jg1D:0000000000000000000000000000000000000000000Jet X-Hashcash: 1:20:140716:gregkh@linuxfoundation.org::F54o/oH2DKxpr6Qg:000000000000000000000000000000000000ylm X-Hashcash: 1:20:140716:x86@kernel.org::WEGSAkmCFHjryemJ:00016T4 X-Hashcash: 1:20:140716:mingo@redhat.com::oCi6raNLKi6B5Jnk:01UzV X-Hashcash: 1:20:140716:linux-mips@linux-mips.org::vwa8NscyQrYk98Au:0000000000000000000000000000000000001WpT X-Hashcash: 1:20:140716:linux-arch@vger.kernel.org::7b+2qn4aLkVMgX8f:000000000000000000000000000000000001fez X-Hashcash: 1:20:140716:linux-arm-kernel@lists.infradead.org::dxgAadrUjyGT6Qdf:00000000000000000000000001akY X-Hashcash: 1:20:140716:arnd@arndb.de::sJTCjGek4wafp28t:00001uI5 X-Hashcash: 1:20:140716:zubair.kakakhel@imgtec.com::mmD2O/ZVn75dH9Lz:000000000000000000000000000000000002A/5 X-Hashcash: 1:20:140716:linux-kernel@vger.kernel.org::81zN1YRqUv9fezYo:00000000000000000000000000000000026YH X-Hashcash: 1:20:140716:ralf@linux-mips.org::d/4oUEWrQ/XY1X1G:0000000000000000000000000000000000000000002UIc X-Hashcash: 1:20:140716:catalin.marinas@arm.com::EOsCJbmp+SeGK0rS:000000000000000000000000000000000000003CEy X-Hashcash: 1:20:140716:tglx@linutronix.de::6Vtta9BSomCZf8Sk:00000000000000000000000000000000000000000003qPE X-Hashcash: 1:20:140716:hpa@zytor.com::Q7EM/AHMKsdZmSV6:00005h1y X-Hashcash: 1:20:140716:m.szyprowski@samsung.com::W/rZCyvdr7j8Zdfg:0000000000000000000000000000000000000Bg7z Date: Wed, 16 Jul 2014 18:39:05 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 41227 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: mina86@mina86.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips On Wed, Jul 16 2014, Zubair Lutfullah Kakakhel wrote: > Adds cma support to the mips architecture. > > cma uses memblock. However, mips uses bootmem. Does cma_early_percent_memory work correctly then? > bootmem is informed about any regions reserved by memblock Alternatively maybe it would make sense to create a new definition of dma_contiguous_reserve_area that uses bootmem and choose it based on some CONFIG_CMA_USE_BOOTMEM which would be selected by MIPS. > dma api is modified to use cma reserved memory regions when available > > Tested using cma_test. cma_test is a simple driver that assigns blocks > of memory from cma reserved sections. > > Signed-off-by: Zubair Lutfullah Kakakhel Acked-by: Michal Nazarewicz > --- > arch/mips/Kconfig | 1 + > arch/mips/include/asm/Kbuild | 1 + > arch/mips/kernel/setup.c | 9 +++++++++ > arch/mips/mm/dma-default.c | 37 +++++++++++++++++++++++++------------ > 4 files changed, 36 insertions(+), 12 deletions(-) > -- Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=./ `o ..o | Computer Science, Michał “mina86” Nazarewicz (o o) ooo +------ooO--(_)--Ooo--