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Fri, 08 Aug 2025 15:21:41 +0200 From: To: "'Miquel Raynal'" Cc: , , , , "'Chris Packham'" References: <118501dc07ae$3f6379a0$be2a6ce0$@gmx.de> <2537e2a1-f958-4e9c-b346-b4fac2152a47@alliedtelesis.co.nz> <034f01dc07e1$8dd75dd0$a9861970$@gmx.de> <87pld6b3y8.fsf@bootlin.com> <052001dc085f$81e731c0$85b59540$@gmx.de> <87ikiy9e9n.fsf@bootlin.com> In-Reply-To: <87ikiy9e9n.fsf@bootlin.com> Subject: AW: AW: AW: NAND ECC errors Date: Fri, 8 Aug 2025 15:21:40 +0200 Message-ID: <05e301dc0867$6195e760$24c1b620$@gmx.de> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQJ9JeHYku6FmVG1oRkuWaRQXLF5+AF1njpmAjY3rtYCca3y5QKA3SNJAnOwz2oBq8WmbrKwkWJg Content-Language: de X-Provags-ID: V03:K1:kwco1f2JfnqTUTyWJ0MZ209t7IV5KkPkGT82DHT/rbWAqv+BU7T bH/ohkp5FQ7SILn5ud4hnYkIHU6T11Vf1nDzwfkm9bLHjKf+GP0dLgke3w4Ekhey/GUFFnN ctjbLL6tmzEUryw7/vLR4QyWBkFc7JIwM1/BldM0RXt5ACi/+r4597T+pGGWLulr3B1o6Qf ajYHKFnDFqTb4ryW7wpPQ== UI-OutboundReport: notjunk:1;M01:P0:SON6p6JWUZM=;WDjMbQwyWXNM1pZf9u61WM9Kk1t 4TV/kNoNM22ibKt9xfSGYYnXIiLodNJFxIWMn60qn6HMk3ErId3mm7PI6kATM5073DoOesubD r6+6mhgHDRpyL2tIlRDDXQWNzViZfJ2HO+8ZX74zKG79amZj0MaV0Ro0aFH9jrGc1MX8Nu1Yk skXE5xjgZcIdIkjYXSdcPGqPgnKHHNkEJ1ZVLMyvD6bcR61SXKgazUFlYenvB5cm+s5SS5w+X BsF8qmMK4wVnU067IfeoHE5BlP+avjoQQnMvBjb+dptQ/kwlr7uBsRjxTld/ZUHEfANSWS+rP Ep5vJbFSva6wmH5H4ZRkWTZEU2NMAAGAZ6zCk0DWBPlzNdfFTZzmRTkQcRemICHiV1SXSnX0I 3n0SZ2l/t5Ci2CvHRy62hpwPYpmE6PJUMnozp1UIQPWmubXLQvppsoxkYY+mgTSbOs5dEw/3I NPIFB7MPm/jwcDIey6r2+P7+Ba8scGvXzVKHQR4ZECwrAu19NXJnpxVuLy4KnCTeXac5Beknz E3s0sr+iT+GFFA25iaHjHYFul9IRVlstSECReTKPwprOzm/ENs5KrzVZcHfRzw7tNyTS18sL6 KOhNseo2G/gTaal/aW4KasCJtno1LwLjrduTMM12WPQ+QikDKwLmoj4cy+QUlJE4KI/wQKagr lA/5QSCVDpJ0aan617oc7OuQsH/rBa6c5aRvf+/8j0kIT+IIuQeohh8rSFHtg8Bl4pGACCzBK 1ogadWJpqcc1y3kByYPqRnYTuhtrkt1+oPn/nMZwkD3GKdMes13NvIUcdrTFOWyCeK/iKH7kL WU2CEgkzXAV07ij4xMpy6vlHYDEWRibbbwoxY+4pV898rt2HazawM7E1LaUJu5BQ07Ceh5smv 5cNrzbRinc0DQeGYSFJiQPJUck+ScGyucP9Yt6PfFEiA7Ylj80QUBw8feVOYR6bff3ABBhzKi 5xZbEpsOfr/wQDYldbNL6t2me2uuB4J30xdl7kNMwW7AbzaZcF8C+tTm0wanFmxQdVh82PkT3 EyHPOBp8sKoKq+WxAfV/YRBnEDdajucvGT/NQIvNZmw2wGLX/ZR9GlyTv7YUcbNb1ddf1mCmO t3wcrTs/muJKUX4qk83L7T4wqK4uK35xwhekB6ijW9IZPxQhv76sshLUHhuz9XCCuMtlWxxxW 4SFR8EM9jkZTqMpXb+MXazuUS8Wwcv9ynzhTHlBG/7LwmHzp4TPxkfrBjf2nOsf7N1+IkVoN7 ix3TdD1ThSxrF2709WNDKFWweVI9eoRG4FcfvK2L6x1IFiWTRzmSfcaae7EZJ2UQt9b/Jhk19 gl2iD1Ewy0wakvhdKghzLnvXaLCodLq2gb2Jb8qevQgB9ovF8rveBRHUFbQupHaAEpdTZ7rU+ hrapOkXD39Gmx5kkCwIbsTklACzfTb+zvIj5i0wWyjAY+bpnW/u2lFpta8yvS4vPZaFYoyQla 7DT6fKJ09/xj21w/QirwuTlUnPDMxFGdv8is1Z/GqhEGu0Yb/ynYn9DiL5daMiJnXhcFJcXTl cZ2vzJGnn1YG2DcWyJ+2ouz+N3k3AYR/zxEhN56Mot7r8QZ3Ezx/YScf+0i0OUQ8Te9Z0bI5w aM616l+dxzpjhhMguH7D0hnAlbvnb23eOmjvPzyvp/ven22ms7hIzRomZTzTj0TWTSVGmNWOM TZFfh1PjXMPBUnHZfaYE4OGhzHbw2Z7gDjAWocR03m50b4/2x0SIuNjnw1r6r8GjtDlzs+39Q YzE/O+714OXHH+0AMQHJyifOBOHxpKMFmCLTD87qVpKGjcCyUxb49Dytjut7i6b/LqeyZIgah kxdRcWAwK5+ZOUkI/a6srI9CuGqNp+BoUfzgOu1Pu3YpFZcTyBpe/R829rtkl7tacg5OYxS5w n+hD+bZu+myhBxtuWObfSJolxmPuLNyuHzou/h1QsOt6Z8cfYIJGFHp2T4DfceVeXUUsBIx9a xN2Wphp3+mTo3yj2SLALCr6RmiP0HWn0tBdCp1mQ+h62Bz3MMHuwTpDAfCYpTv+3Y0ihYeBuq s3F8KazIm9ELZ3+nlfOgoSgSGduZGmDCR4ZKfCQ/5SohzvFDsVMbgytTVc+TMOEdQ8ilVeL6M YdWQ0Y6U2pXuWcrNA4P0jKRhr8k92e/Ct8jptqgpMzZOtNq3UnLebba+1a7/4/Si0Mck1fkUG FGAFzZ+oOR4mHEcabGz13uruLCTa43MARA398qf38jAv4nZXdEo0mHw8SADA37y3yTxWi8btD dhfBJo+s9E60dAAqSU2+/SgYP75NmtcjZeKh6dtdR2/R9C4BfBqx+Uc3YNODzJrQahKsr7BF/ Fc+fZOGMBMuReEKjA4Hqo4eRa1o0sN6bAwEJENoM+2GAeeI3K+C1U8WTdrD5+NQeBQ3RpDzRJ 7CN9JlgqqYaIu/f0zkF/MqrFBNFJo94XfvxiN+LxwqdFtPwZxuHw3HxmsqVh6oev1AHClasYj ISAggcg0yfIrL77JMMYvhlM2QmyVQz05r6NgQLB3AC4EqApGZVZtqsqd+lBBhsjb+CUGAa9mM TStDDQJ9aiuOKFXnxs3+P27w3OtYNrD7QX3KyifBY/uIeU8ZGecyNGL2fzAKYSqC7oqWONg2j p9epCdtm2D2NO+avhx94x72EcTbMu0yZ78+jHowN1zkA4H+wEOd6nK0bgRGQ97AswsIU8NiHT NB0kIszU/qG87iB8vfNqeyagt239LYeVyrrHQC7fGtqSZiN+EEtKJGMb+6TEFhjWxgBCtvJ+w ED7DCiucF3RzZCt7bIvJ15gHVA5eSZkr/1sJi51KVRqniis/H35jJ7Iz8lSEkUrKKBjLgRyOQ coxexRnRIgiUEfaU9bUofJVztOmG2/3+eFtiLsXJmN1MqAnEWb+q5DuNfatRPVQNht3/yDHG0 57C6Npp6u+fIFcTYCthrNNRt5XUGay9kFRdatLATn7uL8ydPPaHZKoJnNMSufkGbiYnpCMUFg gzk2Bul8tt2SrdGd0ZU9CiJDCojHSDZ/jm7A0lRWjKHGwmHM2fU785bsY56pLVxYQm43EfZYH jf/9Tq2HDfFhJ6rWOK6m8PmNv22aLBmv3cXqP/F5M+VDwG9h9SoopZBuZE+NOLGFogifPM8Wi d4pOpDkiPNRFdxRnQuC+RAheN7TNXqkFbd8EPxe6wlqwcyuk5Esre/0rFQWwWr8bkNuViM1ss OjLaOZXHQfqGkAjOSzE9/ZKsTCkQWrYbFc/oFbGQwKLFJ1uL6ueToGa6gM2sUl9rWSN3qvYnK 5mQ7ZafVkvv0Svs+D1VjFTYarr8WiUfp2jI1280o07Oc17MrnHDYfltXd1Y7cJ2l4GEdnUz6Y HcXOOYnXtZOsQA/PFZF6iKXcJmXd+QbvgdC+LZ4gLXOVfrA1TQ= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250808_062154_958522_2E60D92C X-CRM114-Status: GOOD ( 11.83 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org > Von: linux-mtd Im Auftrag von Miquel Raynal > Gesendet: Freitag, 8. August 2025 14:42 > > On 08/08/2025 at 14:25:18 +02, wrote: > Just to fully understand, you are trying to replicate what the software > BCH engine of your realtek SPI controller does? > > If so, why not just configuring the engine directly and use it? It will > be much faster and easier to do. > > Otherwise, if you're trying to do in software what the hardware does, > you must be prepared to more maths: > https://bootlin.com/blog/supporting-a-misbehaving-nand-ecc-engine/ Idea was to start with something I have fully understood. Wantet to leave Hardware for later as ECC is a total new area now (as it was with NAND the last week). Had a short look at the hardware engine GPL code. The most basic parts look straight forward with three functions - Prepare to to encoded data - Prepare to be decoded data - Kick engine ecc-mtk seems tightly integrated into the nand contoller while ecc-mxic seems to be some passthrough/pipeline integration. What would be your advise for the most simple enhancement for our existing Realtek spi-mem controller? Markus ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/