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@xxxxxxxxxxxxxx>
> ---
> 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?
Sascha
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
