Re: [PATCH v9 08/13] mtd: spinand: Create direct mapping descriptors for ECC operations

[Miquel Raynal <miquel.raynal@xxxxxxxxxxx>]

On Tue, 2022-01-04 at 08:36:26 UTC, Miquel Raynal wrote:
> In order for pipelined ECC engines to be able to enable/disable the ECC
> engine only when needed and avoid races when future parallel-operations
> will be supported, we need to provide the information about the use of
> the ECC engine in the direct mapping hooks. As direct mapping
> configurations are meant to be static, it is best to create two new
> mappings: one for regular 'raw' accesses and one for accesses involving
> correction. It is up to the driver to use or not the new ECC enable
> boolean contained in the spi-mem operation.
> 
> As dirmaps are not free (they consume a few pages of MMIO address space)
> and because these extra entries are only meant to be used by pipelined
> engines, let's limit their use to this specific type of engine and save
> a bit of memory with all the other setups.
> 
> Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux.git spi-mem-ecc.

Miquel