tree bf902aa63b71543db101677c5bfef73b7d757fee
parent faa79f27f0a46cd6c3ac3de5e7f3e142598217fc
author Igor Konopko <igor.j.konopko@intel.com> 1544555784 +0100
committer Jens Axboe <axboe@kernel.dk> 1544556155 -0700

lightnvm: dynamic DMA pool entry size

Currently lightnvm and pblk uses single DMA pool, for which the entry
size always is equal to PAGE_SIZE. The contents of each entry allocated
from the DMA pool consists of a PPA list (8bytes * 64), leaving
56bytes * 64 space for metadata. Since the metadata field can be bigger,
such as 128 bytes, the static size does not cover this use-case.

This patch adds support for I/O metadata above 56 bytes by changing DMA
pool size based on device meta size and allows pblk to use OOB metadata
>=16B.

Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>