From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 848C0C4332F for ; Fri, 3 Nov 2023 12:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:Message-ID:References:In-Reply-To:Subject:Cc:To:From :Date:MIME-Version:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=b4CnBG6A4Q76ihhcVTzjy4LOFwEuCBVeJwBmdsIh5mc=; b=bQBX9jUMmOsG3s+N/38FvF6940 3mu8s3KD+CbTVcadxKKD7l94FVIaqh4U/eAhmlKfpWiD1c1DSkLd7/PQWDYNLTAulfLXJV72RD5Kp gbmRcO9HzoCBHN/VZUTekoQt8vyAEXyk0PF8VPMgijih/THucmAymVE7SqXOKISuz7t3vYvmbtzTr l+5CoRkA1TBKtr70mDkkhUZuXTBx55e7lM2N+LURIPtDT7+3Pz6Ru7kn3G8EMBRj/t3jPloIgdztJ LV+w9V03Gn5UyCSbXJ9/TkdpVODA5A+wZ/F3kcvOm/fhdlz5JPk5iZanFnk9zlPW1jUB/+qx1hs4S rBkWz8uw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qytfk-00BR3D-1F; Fri, 03 Nov 2023 12:53:12 +0000 Received: from phobos.denx.de ([2a01:238:438b:c500:173d:9f52:ddab:ee01]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qytff-00BR2L-06; Fri, 03 Nov 2023 12:53:11 +0000 Received: from mail.denx.de (unknown [IPv6:2a01:238:438b:c500:173d:9f52:ddab:ee01]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: festevam@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 4E1D48720C; Fri, 3 Nov 2023 13:53:05 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1699015985; bh=qrzgJ/nHpBYFW2HmH2Bv1JkPgy/GkRnNcGY3PAU6WCg=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=PNtkqwcaUDutrtDi9Y+EhUhdZLMSbSk4ZTEx0ffNE16vThYy9nKZXQsf1qKa0EOIP giahxkPQIEZzGanZEo/IaAE74mY0FS0r+sOEurAICivn8n1/mQxwMOt+wjnibs898N 3dOYcwHWCPUPw9QadH/pUTH2C8eIrX5H3WHddUyNEthpphjTbeQPfw6PfRcuJdI3Xb CsnIADJkVQjl2LJlQEIhKdCqYGyWEJmC4q+blvYmqP98MDrUrmzwEwg87HIHa0AYMA HX1+O4zBaqJSRwwy7jPE6+iouYCdvuMdZMm9QrzGGTKzHsV6IybFtxvn2wOKuyqdcu aU8dMjCyfklow== MIME-Version: 1.0 Date: Fri, 03 Nov 2023 09:53:05 -0300 From: Fabio Estevam To: Tudor Ambarus Cc: Takahiro Kuwano , michael@walle.cc, pratyush@kernel.org, linux-mtd@lists.infradead.org, linux-arm-kernel@lists.infradead.org, bacem.daassi@infineon.com, miquel.raynal@bootlin.com, richard@nod.at Subject: Re: [PATCH v2 2/6] mtd: spi-nor: add erase die (chip) capability In-Reply-To: References: <20231101145853.524045-1-tudor.ambarus@linaro.org> <20231101145853.524045-3-tudor.ambarus@linaro.org> <7fc95ddf-c860-49b9-93de-ef32b9383e42@linaro.org> <216d99d671caa2465519fcc3360c5001@denx.de> <5c48f93a9dd9b2bdc1874dd4eebbf5bb@denx.de> <632457ed6b022856496537bdf8a738ba@denx.de> <6f1aa670-b3f7-4ea3-bc80-773a57e46c36@linaro.org> <968ba4c249926e986b02440ad0421e98@denx.de> <25ca1a4c-683c-4b6d-938b-07323b211815@linaro.org> <5872f7233bc0dc4669aa1324f3ae3cf0@denx.de> <95c16eb0-a785-4a8d-bb42-c5a09b034d0a@linaro.org> Message-ID: <085ba0f9780b1f8b34bc9e1037fec5e7@denx.de> X-Sender: festevam@denx.de User-Agent: Roundcube Webmail/1.3.6 X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231103_055307_363860_EE212912 X-CRM114-Status: UNSURE ( 9.36 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 03/11/2023 09:30, Fabio Estevam wrote: > The problem I see is that the erase operation was super slow. > > Please see the timestamps to get an idea. > > Is this slow-erase behavior expected? Please note that the > SPI controller on the i.MX8MP does not have DMA support at the moment. Measuring the time it takes to erase the whole flash: root@mcde3000a:~# time flash_erase /dev/mtd0 0 0 Erasing 131072 Kibyte @ 0 -- 0 [ 1502.857687] spi-nor spi0.0: ***** nor->reg_proto = 0x00010101 % complete [ 1502.866354] spi-nor spi0.0: ***** [ 1502.870631] spi-nor spi0.0: ***** op.cmd.nbytes = 0x01 [ 1502.875891] spi-nor spi0.0: ***** op.cmd.buswidth = 0x01 [ 1502.881311] spi-nor spi0.0: ***** op.cmd.opcode = 0xc4 [ 1502.886559] spi-nor spi0.0: ***** [ 1502.889888] spi-nor spi0.0: ***** op.addr.nbytes = 0x04 [ 1502.895220] spi-nor spi0.0: ***** op.addr.buswidth = 0x01 [ 1502.900724] spi-nor spi0.0: ***** op.addr.buswidth = 0x0 [ 1502.906141] spi-nor spi0.0: ***** [ 1502.909474] spi-nor spi0.0: ***** op.dummy.nbytes = 0x00 [ 1502.914899] spi-nor spi0.0: ***** op.dummy.buswidth = 0x00 [ 1502.920489] spi-nor spi0.0: ***** [ 1502.923823] spi-nor spi0.0: ***** op.data.buswidth = 0x00 [ 1502.929323] spi-nor spi0.0: ***** op.data.nbytes = 0 [ 1620.329673] spi-nor spi0.0: ***** nor->reg_proto = 0x00010101 [ 1620.335538] spi-nor spi0.0: ***** [ 1620.338869] spi-nor spi0.0: ***** op.cmd.nbytes = 0x01 [ 1620.344127] spi-nor spi0.0: ***** op.cmd.buswidth = 0x01 [ 1620.349543] spi-nor spi0.0: ***** op.cmd.opcode = 0xc4 [ 1620.354791] spi-nor spi0.0: ***** [ 1620.358123] spi-nor spi0.0: ***** op.addr.nbytes = 0x04 [ 1620.363452] spi-nor spi0.0: ***** op.addr.buswidth = 0x01 [ 1620.368953] spi-nor spi0.0: ***** op.addr.buswidth = 0x4000000 [ 1620.374890] spi-nor spi0.0: ***** [ 1620.378229] spi-nor spi0.0: ***** op.dummy.nbytes = 0x00 [ 1620.383646] spi-nor spi0.0: ***** op.dummy.buswidth = 0x00 [ 1620.389234] spi-nor spi0.0: ***** [ 1620.392566] spi-nor spi0.0: ***** op.data.buswidth = 0x00 [ 1620.398068] spi-nor spi0.0: ***** op.data.nbytes = 0 Erasing 131072 Kibyte @ 0 -- 100 % complete real 3m56.795s user 0m0.001s sys 3m15.840s Originally, I was also getting around 4 minutes to erase the whole flash, so the erase-die performance is comparable to the erase one sector at time. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel