From: Fabio Estevam <festevam@denx.de>
To: Tudor Ambarus <tudor.ambarus@linaro.org>
Cc: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>,
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
Date: Fri, 03 Nov 2023 09:53:05 -0300 [thread overview]
Message-ID: <085ba0f9780b1f8b34bc9e1037fec5e7@denx.de> (raw)
In-Reply-To: <e665266fc1565f9d346c95215df39f12@denx.de>
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.
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next prev parent reply other threads:[~2023-11-03 12:53 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-01 14:58 [PATCH v2 0/6] mtd: spi-nor: introduce die erase Tudor Ambarus
2023-11-01 14:58 ` [PATCH v2 1/6] mtd: spi-nor: use kernel sized types instead of c99 types Tudor Ambarus
2023-11-01 14:58 ` [PATCH v2 2/6] mtd: spi-nor: add erase die (chip) capability Tudor Ambarus
2023-11-01 16:04 ` Tudor Ambarus
2023-11-01 16:17 ` Fabio Estevam
2023-11-01 17:27 ` Tudor Ambarus
2023-11-02 16:43 ` Fabio Estevam
2023-11-02 17:36 ` Tudor Ambarus
2023-11-02 17:40 ` Fabio Estevam
2023-11-02 17:47 ` Tudor Ambarus
2023-11-02 17:54 ` Tudor Ambarus
2023-11-02 17:59 ` Tudor Ambarus
2023-11-02 18:01 ` Fabio Estevam
2023-11-02 18:21 ` Tudor Ambarus
2023-11-02 18:33 ` Fabio Estevam
2023-11-02 18:46 ` Tudor Ambarus
2023-11-02 18:56 ` Tudor Ambarus
2023-11-02 21:42 ` Fabio Estevam
2023-11-03 11:47 ` Tudor Ambarus
2023-11-03 12:30 ` Fabio Estevam
2023-11-03 12:53 ` Fabio Estevam [this message]
2023-11-03 13:26 ` Tudor Ambarus
2023-11-03 13:37 ` Fabio Estevam
2023-11-03 13:48 ` Tudor Ambarus
2023-11-03 14:16 ` Fabio Estevam
2023-11-03 14:37 ` Tudor Ambarus
2023-11-03 14:58 ` Fabio Estevam
2023-11-06 14:24 ` Tudor Ambarus
2023-11-06 9:34 ` Michael Walle
2023-11-06 14:23 ` Tudor Ambarus
2023-11-06 14:56 ` Tudor Ambarus
2023-11-09 9:09 ` Michael Walle
2023-11-15 7:06 ` Tudor Ambarus
2023-11-08 8:06 ` Takahiro Kuwano
2023-11-08 8:54 ` Tudor Ambarus
2023-11-01 14:58 ` [PATCH v2 3/6] mtd: spi-nor: spansion: enable die erase for multi die flashes Tudor Ambarus
2023-11-01 14:58 ` [PATCH v2 4/6] mtd: spi-nor: micron-st: " Tudor Ambarus
2023-11-01 14:58 ` [PATCH v2 5/6] mtd: spi-nor: remove NO_CHIP_ERASE flag Tudor Ambarus
2023-11-01 14:58 ` [PATCH v2 6/6] mtd: spi-nor: micron-st: Add support for mt25qu01g Tudor Ambarus
2023-11-01 15:54 ` [PATCH v2 0/6] mtd: spi-nor: introduce die erase Fabio Estevam
2023-11-15 6:10 ` Re (subset): " Tudor Ambarus
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