From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 1 May 2014 20:37:43 +0200 From: Antoine =?iso-8859-1?Q?T=E9nart?= To: Boris BREZILLON Subject: Re: [RFC PATCH 0/3] mtd: nand: add randomizer support Message-ID: <20140501183743.GA17618@kwain> References: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, Maxime Ripard , Brian Norris , David Woodhouse , linux-arm-kernel@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Boris, On Thu, May 01, 2014 at 03:09:49AM +0200, Boris BREZILLON wrote: > Hello, > > This series is a proposal to add support for randomizers (either software > or hardware) to NAND flash controller drivers. Thanks for providing this! I'll need these features soon and I'm happy to see them coming into the nand controller framework. Antoine > The last patch is the sunxi HW randomizer implementation and is just given > as an example (it won't apply on the MTD tree, because it depends on other > stuff not yet posted on the MTD ML, but if you want a full overview of the > NAND Flash controller driver you can take a look at this series [2]). > > I can also provide a software implementation based on LFSR (Left Feedback > Shift Register) algorithm, thought I haven't tested it yet, hence why it's > not part of this series. Let me know if you're interested in this > implementation. > > This series depends on the "per-partition ECC" series [1], because I need > the randomizer seed to be different depending on the partition (for the > same reason I needed ECC config to be different for each partition: the > bootrom config might not fit the NAND chip requirements). > > I'd like to have feedback from both MTD maintainers and driver > developers who might need to implement (or use) a randomizer in their > system, so feel free to comment on this series. > > Best Regards, > > Boris > > [1] https://lkml.org/lkml/2014/2/12/627 > [2] https://groups.google.com/forum/#!msg/linux-sunxi/s3lBb01I0Js/z2NoCFJ83g4J > > > Boris BREZILLON (3): > mtd: nand: introduce a randomizer layer in the NAND framework > of: mtd: add NAND randomizer mode retrieval > mtd: nand: add sunxi randomizer support > > drivers/mtd/nand/nand_base.c | 278 ++++++++++++++++++----- > drivers/mtd/nand/sunxi_nand.c | 507 +++++++++++++++++++++++++++++++++++++++++- > drivers/of/of_mtd.c | 35 +++ > include/linux/mtd/nand.h | 98 ++++++++ > include/linux/of_mtd.h | 6 + > 5 files changed, 858 insertions(+), 66 deletions(-) > > -- > 1.8.3.2 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- Antoine Ténart, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com From mboxrd@z Thu Jan 1 00:00:00 1970 From: antoine.tenart@free-electrons.com (Antoine =?iso-8859-1?Q?T=E9nart?=) Date: Thu, 1 May 2014 20:37:43 +0200 Subject: [RFC PATCH 0/3] mtd: nand: add randomizer support In-Reply-To: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> References: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> Message-ID: <20140501183743.GA17618@kwain> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Boris, On Thu, May 01, 2014 at 03:09:49AM +0200, Boris BREZILLON wrote: > Hello, > > This series is a proposal to add support for randomizers (either software > or hardware) to NAND flash controller drivers. Thanks for providing this! I'll need these features soon and I'm happy to see them coming into the nand controller framework. Antoine > The last patch is the sunxi HW randomizer implementation and is just given > as an example (it won't apply on the MTD tree, because it depends on other > stuff not yet posted on the MTD ML, but if you want a full overview of the > NAND Flash controller driver you can take a look at this series [2]). > > I can also provide a software implementation based on LFSR (Left Feedback > Shift Register) algorithm, thought I haven't tested it yet, hence why it's > not part of this series. Let me know if you're interested in this > implementation. > > This series depends on the "per-partition ECC" series [1], because I need > the randomizer seed to be different depending on the partition (for the > same reason I needed ECC config to be different for each partition: the > bootrom config might not fit the NAND chip requirements). > > I'd like to have feedback from both MTD maintainers and driver > developers who might need to implement (or use) a randomizer in their > system, so feel free to comment on this series. > > Best Regards, > > Boris > > [1] https://lkml.org/lkml/2014/2/12/627 > [2] https://groups.google.com/forum/#!msg/linux-sunxi/s3lBb01I0Js/z2NoCFJ83g4J > > > Boris BREZILLON (3): > mtd: nand: introduce a randomizer layer in the NAND framework > of: mtd: add NAND randomizer mode retrieval > mtd: nand: add sunxi randomizer support > > drivers/mtd/nand/nand_base.c | 278 ++++++++++++++++++----- > drivers/mtd/nand/sunxi_nand.c | 507 +++++++++++++++++++++++++++++++++++++++++- > drivers/of/of_mtd.c | 35 +++ > include/linux/mtd/nand.h | 98 ++++++++ > include/linux/of_mtd.h | 6 + > 5 files changed, 858 insertions(+), 66 deletions(-) > > -- > 1.8.3.2 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- Antoine T?nart, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com From mboxrd@z Thu Jan 1 00:00:00 1970 From: Antoine =?iso-8859-1?Q?T=E9nart?= Subject: Re: [RFC PATCH 0/3] mtd: nand: add randomizer support Date: Thu, 1 May 2014 20:37:43 +0200 Message-ID: <20140501183743.GA17618@kwain> References: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <1398906592-24677-1-git-send-email-b.brezillon.dev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Boris BREZILLON Cc: Brian Norris , David Woodhouse , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mtd-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Maxime Ripard , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org Hi Boris, On Thu, May 01, 2014 at 03:09:49AM +0200, Boris BREZILLON wrote: > Hello, >=20 > This series is a proposal to add support for randomizers (either soft= ware > or hardware) to NAND flash controller drivers. Thanks for providing this! I'll need these features soon and I'm happy to see them coming into the nand controller framework. Antoine > The last patch is the sunxi HW randomizer implementation and is just = given > as an example (it won't apply on the MTD tree, because it depends on = other > stuff not yet posted on the MTD ML, but if you want a full overview o= f the > NAND Flash controller driver you can take a look at this series [2]). >=20 > I can also provide a software implementation based on LFSR (Left Feed= back > Shift Register) algorithm, thought I haven't tested it yet, hence why= it's > not part of this series. Let me know if you're interested in this > implementation. >=20 > This series depends on the "per-partition ECC" series [1], because I = need > the randomizer seed to be different depending on the partition (for t= he > same reason I needed ECC config to be different for each partition: t= he > bootrom config might not fit the NAND chip requirements). >=20 > I'd like to have feedback from both MTD maintainers and driver > developers who might need to implement (or use) a randomizer in their > system, so feel free to comment on this series. >=20 > Best Regards, >=20 > Boris >=20 > [1] https://lkml.org/lkml/2014/2/12/627 > [2] https://groups.google.com/forum/#!msg/linux-sunxi/s3lBb01I0Js/z2N= oCFJ83g4J=20 >=20 >=20 > Boris BREZILLON (3): > mtd: nand: introduce a randomizer layer in the NAND framework > of: mtd: add NAND randomizer mode retrieval > mtd: nand: add sunxi randomizer support >=20 > drivers/mtd/nand/nand_base.c | 278 ++++++++++++++++++----- > drivers/mtd/nand/sunxi_nand.c | 507 ++++++++++++++++++++++++++++++++= +++++++++- > drivers/of/of_mtd.c | 35 +++ > include/linux/mtd/nand.h | 98 ++++++++ > include/linux/of_mtd.h | 6 + > 5 files changed, 858 insertions(+), 66 deletions(-) >=20 > --=20 > 1.8.3.2 >=20 >=20 > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel --=20 Antoine T=E9nart, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- To unsubscribe from this list: send the line "unsubscribe devicetree" i= n the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751222AbaEAShw (ORCPT ); Thu, 1 May 2014 14:37:52 -0400 Received: from top.free-electrons.com ([176.31.233.9]:53430 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750788AbaEAShu (ORCPT ); Thu, 1 May 2014 14:37:50 -0400 Date: Thu, 1 May 2014 20:37:43 +0200 From: Antoine =?iso-8859-1?Q?T=E9nart?= To: Boris BREZILLON Cc: Brian Norris , David Woodhouse , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org, Maxime Ripard , linux-arm-kernel@lists.infradead.org Subject: Re: [RFC PATCH 0/3] mtd: nand: add randomizer support Message-ID: <20140501183743.GA17618@kwain> References: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1398906592-24677-1-git-send-email-b.brezillon.dev@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Boris, On Thu, May 01, 2014 at 03:09:49AM +0200, Boris BREZILLON wrote: > Hello, > > This series is a proposal to add support for randomizers (either software > or hardware) to NAND flash controller drivers. Thanks for providing this! I'll need these features soon and I'm happy to see them coming into the nand controller framework. Antoine > The last patch is the sunxi HW randomizer implementation and is just given > as an example (it won't apply on the MTD tree, because it depends on other > stuff not yet posted on the MTD ML, but if you want a full overview of the > NAND Flash controller driver you can take a look at this series [2]). > > I can also provide a software implementation based on LFSR (Left Feedback > Shift Register) algorithm, thought I haven't tested it yet, hence why it's > not part of this series. Let me know if you're interested in this > implementation. > > This series depends on the "per-partition ECC" series [1], because I need > the randomizer seed to be different depending on the partition (for the > same reason I needed ECC config to be different for each partition: the > bootrom config might not fit the NAND chip requirements). > > I'd like to have feedback from both MTD maintainers and driver > developers who might need to implement (or use) a randomizer in their > system, so feel free to comment on this series. > > Best Regards, > > Boris > > [1] https://lkml.org/lkml/2014/2/12/627 > [2] https://groups.google.com/forum/#!msg/linux-sunxi/s3lBb01I0Js/z2NoCFJ83g4J > > > Boris BREZILLON (3): > mtd: nand: introduce a randomizer layer in the NAND framework > of: mtd: add NAND randomizer mode retrieval > mtd: nand: add sunxi randomizer support > > drivers/mtd/nand/nand_base.c | 278 ++++++++++++++++++----- > drivers/mtd/nand/sunxi_nand.c | 507 +++++++++++++++++++++++++++++++++++++++++- > drivers/of/of_mtd.c | 35 +++ > include/linux/mtd/nand.h | 98 ++++++++ > include/linux/of_mtd.h | 6 + > 5 files changed, 858 insertions(+), 66 deletions(-) > > -- > 1.8.3.2 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel -- Antoine Ténart, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com