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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: [PATCH 03/10] block: allow block devices to implement the cdev erase operation
Date: Tue, 30 Jul 2024 13:10:05 +0200	[thread overview]
Message-ID: <fed9e44d-dc12-483c-ac02-7e63e2190b72@pengutronix.de> (raw)
In-Reply-To: <Zqiqn66-dv3m_MOB@pengutronix.de>

On 30.07.24 10:55, Sascha Hauer wrote:
> On Tue, Jul 30, 2024 at 09:19:22AM +0200, Ahmad Fatoum wrote:
>> We mainly implement cdev erase for raw flashes. Many block devices, like
>> NVMe, SSD or SD/MMC are also flash-based and expose a mechanism or
>> multiple to trigger an erase on hardware or flash translation layer
>> level without an accompanied write.
>>
>> To make it possible to use this functionality elsewhere in barebox,
>> let's have the common block device layer pass through the erase
>> operation, so it may be implemented in a device-specific manner.
>>
>> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
>> ---
>>  common/block.c  | 43 +++++++++++++++++++++++++++++++++++++++++++
>>  include/block.h |  1 +
>>  2 files changed, 44 insertions(+)
>>
>> diff --git a/common/block.c b/common/block.c
>> index f55da775a797..b43fcbe6927b 100644
>> --- a/common/block.c
>> +++ b/common/block.c
>> @@ -380,10 +380,45 @@ static int block_op_discard_range(struct cdev *cdev, loff_t count, loff_t offset
>>  	return 0;
>>  }
>>  
>> +static bool region_overlap(loff_t starta, loff_t lena,
>> +                           loff_t startb, loff_t lenb)
>> +{
>> +        if (starta + lena <= startb)
>> +                return 0;
>> +        if (startb + lenb <= starta)
>> +                return 0;
>> +        return 1;
>> +}
> 
> We already have this function in fs/devfs-core.c. Time to export it?

This used to be exported, but the export was removed in commit
04e2aa516ed5 ("common.h: move and rename lregion_overlap()").

I can add it back if you prefer.


> 
> Sascha
> 

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  reply	other threads:[~2024-07-30 11:10 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-07-30  7:19 [PATCH 00/10] mmc: add SD/eMMC erase support Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 01/10] fs: give erase() a new erase_type parameter Ahmad Fatoum
2024-07-30  8:31   ` Sascha Hauer
2024-07-30  8:32     ` Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 02/10] block: factor out chunk_flush helper Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 03/10] block: allow block devices to implement the cdev erase operation Ahmad Fatoum
2024-07-30  8:55   ` Sascha Hauer
2024-07-30 11:10     ` Ahmad Fatoum [this message]
2024-07-30 11:21       ` Sascha Hauer
2024-07-30  7:19 ` [PATCH 04/10] mci: turn bool members into bitfield in struct mci Ahmad Fatoum
2024-07-30  9:06   ` Sascha Hauer
2024-07-30 11:10     ` Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 05/10] mci: describe more command structure in mci.h Ahmad Fatoum
2024-07-30  9:25   ` Yann Sionneau
2024-07-30 11:07     ` Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 06/10] mci: core: use CONFIG_MCI_WRITE, not CONFIG_BLOCK_WRITE Ahmad Fatoum
2024-07-30  9:18   ` Sascha Hauer
2024-07-30 11:08     ` Ahmad Fatoum
2024-07-31  7:19       ` Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 07/10] mci: add support for discarding write blocks Ahmad Fatoum
2024-07-30  9:23   ` Yann Sionneau
2024-07-30 11:14     ` Ahmad Fatoum
2024-07-30 10:05   ` Sascha Hauer
2024-07-30 11:17     ` Ahmad Fatoum
2024-07-30  7:19 ` [PATCH 08/10] commands: sync: add new command to flush cached writes Ahmad Fatoum
2024-07-30 10:08   ` Sascha Hauer
2024-07-30  7:19 ` [PATCH 09/10] mci: core: remove reference to SD Card from common mci_card_probe Ahmad Fatoum
2024-07-30 10:09   ` Sascha Hauer
2024-07-30  7:19 ` [PATCH 10/10] commands: blkstats: add command to print block device statistics Ahmad Fatoum

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