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Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DS1PEPF0001709B.mail.protection.outlook.com (10.167.18.105) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6792.20 via Frontend Transport; Wed, 20 Sep 2023 07:55:09 +0000 Received: from [192.168.137.2] (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.27; Wed, 20 Sep 2023 02:55:06 -0500 Message-ID: Date: Wed, 20 Sep 2023 09:55:04 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/3] mtd: rawnand: arasan: Ensure program page operations are successful Content-Language: en-US To: Miquel Raynal CC: Richard Weinberger , Vignesh Raghavendra , Tudor Ambarus , Pratyush Yadav , Michael Walle , , Thomas Petazzoni , References: <20230717194221.229778-1-miquel.raynal@bootlin.com> <20230717194221.229778-2-miquel.raynal@bootlin.com> <20230911175247.44c1d894@xps-13> <20230912161752.581019bc@xps-13> From: Michal Simek Autocrypt: addr=michal.simek@amd.com; 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charset="UTF-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0001709B:EE_|BL3PR12MB6524:EE_ X-MS-Office365-Filtering-Correlation-Id: 89bbcfa1-10a7-4691-f08c-08dbb9aee952 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230031)(4636009)(39860400002)(346002)(376002)(396003)(136003)(451199024)(186009)(82310400011)(1800799009)(46966006)(40470700004)(36840700001)(478600001)(41300700001)(40480700001)(83380400001)(44832011)(5660300002)(2906002)(70206006)(316002)(70586007)(16576012)(54906003)(6916009)(8936002)(8676002)(4326008)(31686004)(53546011)(66899024)(2616005)(40460700003)(26005)(16526019)(426003)(336012)(47076005)(36860700001)(36756003)(356005)(81166007)(31696002)(86362001)(82740400003)(43740500002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Sep 2023 07:55:09.1782 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 89bbcfa1-10a7-4691-f08c-08dbb9aee952 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0001709B.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6524 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org Hi Miquel, On 9/12/23 16:17, Miquel Raynal wrote: > Hi Michal, > > michal.simek@amd.com wrote on Tue, 12 Sep 2023 15:55:23 +0200: > >> Hi Miquel, >> >> On 9/11/23 17:52, Miquel Raynal wrote: >>> Hi Michal, >>> >>> miquel.raynal@bootlin.com wrote on Mon, 17 Jul 2023 21:42:20 +0200: >>> >>>> The NAND core complies with the ONFI specification, which itself >>>> mentions that after any program or erase operation, a status check >>>> should be performed to see whether the operation was finished *and* >>>> successful. >>>> >>>> The NAND core offers helpers to finish a page write (sending the >>>> "PAGE PROG" command, waiting for the NAND chip to be ready again, and >>>> checking the operation status). But in some cases, advanced controller >>>> drivers might want to optimize this and craft their own page write >>>> helper to leverage additional hardware capabilities, thus not always >>>> using the core facilities. >>>> >>>> Some drivers, like this one, do not use the core helper to finish a page >>>> write because the final cycles are automatically managed by the >>>> hardware. In this case, the additional care must be taken to manually >>>> perform the final status check. >>>> >>>> Let's read the NAND chip status at the end of the page write helper and >>>> return -EIO upon error. >>>> >>>> Cc: Michal Simek >>>> Cc: stable@vger.kernel.org >>>> Fixes: 88ffef1b65cf ("mtd: rawnand: arasan: Support the hardware BCH ECC engine") >>>> Signed-off-by: Miquel Raynal >>>> >>>> --- >>>> >>>> Hello Michal, >>>> >>>> I have not tested this, but based on a report on another driver, I >>>> believe the status check is also missing here and could sometimes >>>> lead to unnoticed partial writes. >>>> >>>> Please test on your side that everything still works and let me >>>> know how it goes. >>> >>> Any news from the testing team about patches 2/3 and 3/3? >> >> I asked Amit to test and he didn't get back to me even I asked for it couple of times. > > Ok. > >> Can you please tell me how to test it? I will setup HW myself and test it and get back to you. > > I believe setting up the board to use the hardware BCH engine and > performing basic erase/write/read testing with a known file and check > it still behaves correctly would work. You can also run > > nandbiterrs -i /dev/mtdx > > as a second step and verify there is no difference with and without the > patch and finally check the impact: > > flash_speed -d -c 10 /dev/mtdx > (be careful: this is a destructive operation) I run this myself. pl353 test log before the patch. # cat /proc/mtd dev: size erasesize name mtd0: 10000000 00020000 "pl35x-nand-controller" # nandbiterrs -i /dev/mtd0 incremental biterrors test Successfully corrected 0 bit errors per subpage Inserted biterror @ 0/5 Read reported 1 corrected bit errors Successfully corrected 1 bit errors per subpage Inserted biterror @ 0/2 Failed to recover 1 bitflips Read error after 2 bit errors per page # flash_speed -d -c 10 /dev/mtd0 scanning for bad eraseblocks scanned 10 eraseblocks, 0 are bad testing eraseblock write speed eraseblock write speed is 4555 KiB/s testing eraseblock read speed eraseblock read speed is 5765 KiB/s testing page write speed page write speed is 4383 KiB/s testing page read speed page read speed is 5614 KiB/s testing 2 page write speed 2 page write speed is 4444 KiB/s testing 2 page read speed 2 page read speed is 5688 KiB/s Testing erase speed erase speed is 320000 KiB/s Testing 2x multi-block erase speed 2x multi-block erase speed is 320000 KiB/s Testing 4x multi-block erase speed 4x multi-block erase speed is 320000 KiB/s Testing 8x multi-block erase speed 8x multi-block erase speed is 320000 KiB/s Testing 16x multi-block erase speed 16x multi-block erase speed is 320000 KiB/s Testing 32x multi-block erase speed 32x multi-block erase speed is 320000 KiB/s Testing 64x multi-block erase speed 64x multi-block erase speed is 320000 KiB/s finished # dmesg | grep nand [ 2.876719] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda [ 2.883130] nand: Micron MT29F2G08ABAEAWP [ 2.887230] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64 # When applied # cat /proc/mtd dev: size erasesize name mtd0: 10000000 00020000 "pl35x-nand-controller" # nandbiterrs -i /dev/mtd0 incremental biterrors test Successfully corrected 0 bit errors per subpage Inserted biterror @ 0/5 Read reported 1 corrected bit errors Successfully corrected 1 bit errors per subpage Inserted biterror @ 0/2 Failed to recover 1 bitflips Read error after 2 bit errors per page # flash_speed -d -c 10 /dev/mtd0 scanning for bad eraseblocks scanned 10 eraseblocks, 0 are bad testing eraseblock write speed eraseblock write speed is 4522 KiB/s testing eraseblock read speed eraseblock read speed is 5765 KiB/s testing page write speed page write speed is 4383 KiB/s testing page read speed page read speed is 5638 KiB/s testing 2 page write speed 2 page write speed is 4444 KiB/s testing 2 page read speed 2 page read speed is 5714 KiB/s Testing erase speed erase speed is 320000 KiB/s Testing 2x multi-block erase speed 2x multi-block erase speed is 320000 KiB/s Testing 4x multi-block erase speed 4x multi-block erase speed is 320000 KiB/s Testing 8x multi-block erase speed 8x multi-block erase speed is 320000 KiB/s Testing 16x multi-block erase speed 16x multi-block erase speed is 320000 KiB/s Testing 32x multi-block erase speed 32x multi-block erase speed is 320000 KiB/s Testing 64x multi-block erase speed 64x multi-block erase speed is 320000 KiB/s finished # dmesg | grep nand [ 2.896206] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda [ 2.902648] nand: Micron MT29F2G08ABAEAWP [ 2.906667] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64 Behavior is the same. Speed is changing on every run. I don't have zynqmp board here but will try to get data asap. Thanks, Michal